How to Check Your Patient's Visual Acuity

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  • Опубліковано 10 січ 2025

КОМЕНТАРІ • 1,7 тис.

  • @cassidylancaster1611
    @cassidylancaster1611 6 років тому +86

    I’m a new LPN and they did not teach the Snellen chart in my course but very briefly went over what it was used for. This was very informative and to the point of learning it well. Enjoyed this video and would recommend to someone needing to learn how to use it! 👍🏼

  • @onlyontuesdays07
    @onlyontuesdays07 5 років тому +60

    Thank you for this video! Very clear on how to score visual acuity. I have my first job in pediatrics as a CMA and I am doing physicals all day and this was somewhat unclear to me until I watched this video! I now can be more confident on how to score them.

    • @dkcalgary
      @dkcalgary  5 років тому +6

      Yay! I'm delighted to hear this!

  • @kiran2421
    @kiran2421 6 років тому +2201

    am i the only one whos doing this because i got a appointment in a few weeks?? 💀

  • @uzoamakaokoli1093
    @uzoamakaokoli1093 4 роки тому +10

    I'm presently carrying out a research on information resources for visually impaired students, i kept seeing 20 this, 20 that in all of my readings, decided to check out videos here on you-tube to understand what all those is about, and this really did justice to my comprehension. Thanks

    • @dkcalgary
      @dkcalgary  4 роки тому +5

      Dear Okoli, wow, this is very generous feedback. I am beyond thrilled to learn how this has helped you and, by extension, your work with students with visual impairments. This is why I love open-access learning resources: they go out into the world and can have good and unforeseen impact. Also, this is good affirmation of my style: to explain why things are or why we do them a certain way and not just demonstrate. Can you subscribe to me, and then I'll try to email you directly to learn more. Take care!

  • @sj4645
    @sj4645 3 роки тому +21

    Thank you so much, I always had trouble figuring this out. No one has explained and taught how to read this chart. You explained it so well. So thankful to the UA-cam platform.

  • @beuhbruh1915
    @beuhbruh1915 7 років тому +459

    what if that person knows the sequence of this chart?

    • @dkcalgary
      @dkcalgary  7 років тому +115

      Hi, that is a great question. In grade 4, I personally memorized the chart so I could avoid glasses, but I was busted when they swapped out for a different chart. What I will do if I suspect it is jump around and point to letters here and there. Finally, if I really suspect it, I might ask them to be checked by an optometrist, who will have a variety of charts, including projected ones, that can't be memorized.
      However, usually, I'm dealing with someone who has some sort of eye problem. They want to see and have any problems taken care of. So, I'm not usually caring for someone who is trying to avoid glasses or otherwise minimize any problems with vision. DK

    • @dkcalgary
      @dkcalgary  5 років тому +20

      This is a great question. If you suspect it, swap it out for a different chart. If you don't have one, then maybe the best option is to refer to an optometrist who will have all sorts of cheat-proof ways to check visual acuity. The great thing with having a physical chart is you as the clinician DO memorize it, which means you can look at the patient while they are reading it, and make sure they are doing it correctly (such as making sure they are fully covering the eye, etc.). Thanks! DK

    • @almanac520
      @almanac520 5 років тому +2

      There are rondo mixed digital charts. Useful for some applications, but not as essential as you would think

    • @timothytiberia826
      @timothytiberia826 5 років тому +7

      Have them repeat it backwards

    • @Win090949
      @Win090949 4 роки тому

      dkcalgary S Q U I N T

  • @manatee580
    @manatee580 9 років тому +617

    I didn't know there was a whiteboard there I thought he was just righting on the wall lol

    • @dkcalgary
      @dkcalgary  9 років тому +82

      +Manatee()5 - I have written on the wall by mistake in the past, but not on film! It took a long time to get the marker off the wall! :)

    • @pew4410
      @pew4410 8 років тому +3

      dkcalgary ehm i want to say something.. I cant even see the E

    • @pew4410
      @pew4410 8 років тому +1

      dkcalgary and im not lying

    • @ahgasesatheartandalwaysbe4396
      @ahgasesatheartandalwaysbe4396 7 років тому

      No Name you should went to optometrist

    • @laithjamous5940
      @laithjamous5940 7 років тому +1

      خلب()5

  • @silviacanizares6588
    @silviacanizares6588 9 років тому +28

    You made it so much easier to understand. Great video! Thank you :)

  • @drumsandroses22
    @drumsandroses22 2 роки тому +7

    what a fantastic video. i'm an occupational therapist using it for school screenings. Thank you

    • @dkcalgary
      @dkcalgary  2 роки тому +2

      This is great to hear!

  • @softpearls21
    @softpearls21 6 років тому +28

    Wow you're so Amazing...I learned exactly how to do this..Such a great Teacher...Sometimes people explain things and you still can't get it, but the way you explained it was super easy..Thanks for this :)

    • @dkcalgary
      @dkcalgary  5 років тому +5

      This is great feedback - thanks!

  • @jeremysaavedra3141
    @jeremysaavedra3141 6 років тому +4

    Video was very helpful when I was learning how to check visual acuity on patients. Thank you.

  • @Kitty4u
    @Kitty4u 7 років тому +143

    I don't wanna be an eye doctor or test peoples visions or anything but I watched this whole video.

    • @dkcalgary
      @dkcalgary  7 років тому +8

      Hi, glad that you liked it! DK

    • @dkcalgary
      @dkcalgary  5 років тому +5

      Hi, wow, that is pretty keen! DK

    • @almanac520
      @almanac520 5 років тому +2

      Nice. Ophthalmic Technician is a great job, that is always short-staffed

  • @mariaalvarado7830
    @mariaalvarado7830 7 років тому +19

    Great video for learning! :) I feel a lot better about the charting.

    • @dkcalgary
      @dkcalgary  7 років тому

      Hi, in the video I have tried to explain things, just just tell them at the viewer. So, thanks! DK

  • @evanna1965
    @evanna1965 6 років тому +4

    I need this guy to explain my whole life... Subscribed ;)

    • @evanna1965
      @evanna1965 6 років тому +1

      You have a gift of explaining concepts.

  • @murgatroid4026
    @murgatroid4026 5 років тому +59

    Loved this succinct and concise education session. Thank you!

    • @dkcalgary
      @dkcalgary  5 років тому +6

      This is helpful feedback! Thanks, dk

    • @ivans0607
      @ivans0607 2 роки тому +1

      @@dkcalgary how much distance I must have to see it ?

    • @DaynaHerroz
      @DaynaHerroz Рік тому +1

      Asked how do I figure out what readers from Walmart I would be. . I am home bound,

  • @ofunnemordi
    @ofunnemordi 7 років тому +56

    If I can't see the letter do I just say "I can't see it."?
    Am I allowed to squint?

    • @dkcalgary
      @dkcalgary  7 років тому +28

      People will squint, so you score what they can see. DK

  • @joanag9835
    @joanag9835 7 років тому +9

    Thank you! Encountered Kindergarten Test Chart for the FIRST time. Awesome. :)

  • @bahirurahmeto9271
    @bahirurahmeto9271 8 років тому +60

    Found it so explanatory,thanks!

    • @dkcalgary
      @dkcalgary  6 років тому +3

      great!

    • @cyberbros3031
      @cyberbros3031 4 роки тому

      dkcalgary I can read 20/15 but cannot read 20/100

    • @cyberbros3031
      @cyberbros3031 4 роки тому

      dkcalgary what does that means

    • @christopheredale
      @christopheredale 4 роки тому +2

      The Duos Gamer wait. So you can completely read a smaller row. But cannot read the row above it (a larger row)? Well my friend, there’s only one explanation.... One explanation indeed..
      WITCH!!! 🧹✨

    • @cyberbros3031
      @cyberbros3031 4 роки тому +1

      Christopher what about u?

  • @GaneshPatil-mp2zh
    @GaneshPatil-mp2zh 5 років тому +9

    Thank you sir. It's a very good explanation to understand it easily

  • @kenisha7158
    @kenisha7158 Рік тому +1

    This is the best informative video I've see!! Thank you so much.

  • @mastermind7538
    @mastermind7538 7 років тому +14

    Thank you Sir. This video was really helpful. Love from India😃😃😃

    • @dkcalgary
      @dkcalgary  7 років тому +3

      Hi, glad you liked it! DK

  • @tammyhahn9572
    @tammyhahn9572 2 роки тому +8

    Thank you for explaining how to read a visual acuity chart. It made things a lot clear. I do have two questions though. What if you do not have the space to measure out 20 ft distance? How can you check there acuity then? Also, what are the numbers on the right side of the chart for? Thank you.

    • @dkcalgary
      @dkcalgary  2 роки тому +2

      Great questions! You can do 10 feet and then ensure you adjust (so if someone read the 20/10 line perfectly at 10 feet, it would become 20/20). Eye clinics will have fancy mirrors set up to give a longer distance too. The numbers on the right are so you can say, "Can you read line 8?" I find because they are on the right side, it is not intuitive for anyone.

    • @shellieo
      @shellieo 4 місяці тому

      Same and I am a CCMa

  • @cheddarsuperstar
    @cheddarsuperstar 4 роки тому +3

    love this. i have a sever astigmatism. this vid enlightened me on how do doctors actually measure eye vision💖

    • @dkcalgary
      @dkcalgary  4 роки тому +2

      Things are more nuanced with astigmatism (I have it too). That's beyond me. But I'm glad this video explained how and why for the big topics. Take care, DK

  • @lala-nr1oo
    @lala-nr1oo 7 років тому +20

    Thank you so much for this video. This is really helpful.

  • @bLooP67
    @bLooP67 5 років тому +92

    Got my eyes checked yesterday; my right eye is 20/40,my left eye is 20/50.......Guess I need some glasses 😅

    • @nvrmxithx
      @nvrmxithx 4 роки тому +8

      Lmao Jungkook is jungshook in the thumbnail 😂😂💜

    • @40hzdrift22
      @40hzdrift22 4 роки тому +11

      I'm 20/400

    • @ethaneFX
      @ethaneFX 4 роки тому +10

      You chose the wrong path.
      Now tell me your latest prescription
      -1 or -2 or -3.
      Bro still have time. dont follow these fucking culprits optometrists.
      You can reverse your myopia .

    • @paramjeetthakkar7088
      @paramjeetthakkar7088 4 роки тому +5

      @@ethaneFX how? How can we improve myopia

    • @SrJrXVIII
      @SrJrXVIII 4 роки тому +3

      I can read the 10th letter stuffs in each eye but my right eye missed 1 letter

  • @mariaparedes8834
    @mariaparedes8834 3 роки тому +1

    you are a really good teacher, now I know how to do visual acuity.

  • @filmsensei
    @filmsensei 8 років тому +31

    Great video. The only thing different I was taught (when I was training in St. Louis) was if they only got two letters correct on a line then, as you said, call it the line above: 20/50 but give them credit for the two they got right. So it would be 20/50 +2. Maybe that's just a U.S. thing...

    • @armenianchik
      @armenianchik 2 роки тому +1

      That's exactly what I was trained to do as well.

  • @yasminvillanueva3141
    @yasminvillanueva3141 6 років тому +2

    Loved this very useful because I started a job as a Medical assistant

    • @dkcalgary
      @dkcalgary  5 років тому +1

      Hi - in fact, that's why this video was made! Our clinic had hired some new medical assistants, and because of my emergency background, I was asked to teach them this stuff. Great! Next year, we had some more hires and was asked to teach again, so I thought, "This is a great time for a teaching video!" And the rest is history - the most viewed visual acuity video on youtube, as far as I can see. (See what I did there?) :) DK

  • @EuansGirl
    @EuansGirl 5 років тому +8

    LOL. The eraser. Haha. Watching this on panic mode because I've got PHYSIOLOGY practicals tomorrow huhuhu

  • @Deeana_slaysssss
    @Deeana_slaysssss 4 роки тому +1

    can you please explain using a pinhole in visual acuity? how we can write it? can we write 20/20 -3 ? i don't understand. thank you so much

    • @dkcalgary
      @dkcalgary  4 роки тому +1

      Pinholes partial correction due to light bending because of the small pinhole size. If someone needs a pinhole to see, then they need to see an eye doc of some type. I guess if someone can make out letters with a pinhole that's way better than not being able to read any letters with a pinhole. I would clearly document scores without pinhole and then with super obvious "PINHOLE" document their score with the pinhole.

  • @sifatullahanwary343
    @sifatullahanwary343 5 років тому +8

    What a nice and clear explanation, thanks 🙏

  • @nehadesai6978
    @nehadesai6978 6 років тому

    you just saved my life. my practical is tomorrow!!

  • @AteDok
    @AteDok 7 років тому +18

    thank u for sharing! this makes everything clear ❤️❤️❤️

    • @dkcalgary
      @dkcalgary  7 років тому +3

      Nice pun! Thanks for the feedback! DK

  • @arianniforever5350
    @arianniforever5350 3 роки тому +1

    After 6 yrs ago I still come back to this video . Because dr explain so well /:)

    • @dkcalgary
      @dkcalgary  3 роки тому +1

      Wow Arianni! Thanks very much!

  • @keyalena5534
    @keyalena5534 3 роки тому +12

    i remember reading all those perfectly during my dads eye checkup and wanting to wear glasses.

    • @bitaniazelalem8946
      @bitaniazelalem8946 3 роки тому +3

      me tooooo I rmb they did an eye checkup at my school and I lied to the ppl and said I couldn’t see any of the letters and they sent a little home to my mother telling them I need to go to an eye doctor to get a checkup and my mother told them I can see and stuff bc she knew I was lying but they told her she needed to go so I went and I ended up getting glasses and now I wear glasses and I’m blind 🥲

  • @Bonux000
    @Bonux000 6 років тому +4

    Awesome explanation Doc! Thank you!

  • @alishes3695
    @alishes3695 5 років тому +4

    Wow I’ve learned so much this was a great video

  • @irfanullahkhan9849
    @irfanullahkhan9849 6 місяців тому

    Thank you so much sir✨💖 your video is so helpful,keep up the good work,thanks sir💓

  • @noeymarie5803
    @noeymarie5803 9 років тому +7

    Thank you for this! Great, clear information!

  • @Bussjaeger
    @Bussjaeger 2 роки тому +1

    Thank you. I needed to understand this better & you made it enjoyable to learn. Appreciate it. New subscriber. :)

  • @user-kx6nr2wy9c
    @user-kx6nr2wy9c 3 роки тому +3

    This was awesome. I am currently in Ophthalmic Tech School. Explained clearly!!

    • @dkcalgary
      @dkcalgary  3 роки тому +2

      Wow! THIS is a prestigious endorsement- thanks!

    • @sweetbeep
      @sweetbeep 2 роки тому +1

      ... I'm seeing this video so I can reverse my myopia! I hope you can tell your patients they can reverse it if they want to! 😃

  • @shipwreck4273
    @shipwreck4273 5 років тому +1

    A very good description. Thanks doc

  • @asadiqbal9842
    @asadiqbal9842 8 років тому +8

    thank you it helps many students like me :)

  • @erne1332
    @erne1332 2 роки тому +1

    Thank you! Thank you! Very detailed and informative information!

  • @myraramiera5674
    @myraramiera5674 9 років тому +14

    Thanks doc. such a wonderful learning. Easy to understand.

  • @ferrarielmos8557
    @ferrarielmos8557 8 років тому +256

    Don't have a perfect eye sight? Well i suppose you can try to remember these words. ;)

    • @EasyGaming11
      @EasyGaming11 8 років тому +31

      Its Rizl
      Lol if you have bad eyesight but good memory, you're good xD

    • @FidaAifiya
      @FidaAifiya 7 років тому +55

      then you miss the whole point of this test

    • @MonkeyDLuffy-xr4fl
      @MonkeyDLuffy-xr4fl 7 років тому +19

      Well, I suppose you can enjoy further macular degeneration. ;)

    • @mehuhinhiisduniyaka6831
      @mehuhinhiisduniyaka6831 7 років тому +1

      Its Rizl ok

    • @br0ke803
      @br0ke803 7 років тому +1

      I did that in 5th grade and avoided glasses I have been lucky cuz I’ve been told I needed them for a month now and I just continue to sit in the front of the room and the nurses bad memory

  • @aaabbb8811
    @aaabbb8811 4 роки тому +3

    What a great explanation! THANK YOU SO MUCH

    • @travelmood4543
      @travelmood4543 3 роки тому +1

      Could you please confirm the font size of those letters on the white paper in cm/mm?

  • @Ilovepineapple
    @Ilovepineapple 5 років тому +3

    I have a prescription of -6.5 D(right eye) and -6.25 D(left eye) with +1.0 cylindrical, what would be my vision in 20/X format?

  • @nichtlineare
    @nichtlineare 4 роки тому +3

    when you ask a patient to read the letters, does this mean they should be able to see the letters crisp and clear? or just that they can see the letters a bit blurry but sufficient to read it? My understanding is that you want the vision to be able to read it without any blurriness?

    • @dkcalgary
      @dkcalgary  3 роки тому +2

      Ideally no blurriness, but you score them based on what they answer, blurry or not. If someone needs glasses, an optometrist would try to get them to the right level of correction without over-shooting.

  • @nssproductions.5079
    @nssproductions.5079 Рік тому +4

    I was so unsure what the meaning of the denominator was in the scoring system. Thank you so much for clearing this up!

  • @moi26praise47
    @moi26praise47 9 місяців тому

    Finally, I get it. Thank you, sir!!!

  • @bobbyu8991
    @bobbyu8991 5 років тому +18

    Why would a person cheat on an eye exam ? They only exam no one ever did

    • @boneappletea5890
      @boneappletea5890 5 років тому +5

      Bobby Urkevich some people really don’t wanna get glasses like kids usually can avoid it

    • @dkcalgary
      @dkcalgary  5 років тому +7

      Yup. As a kid, I didn't want glasses and cheated in Grade 2 or 3.

    • @leecolon321
      @leecolon321 4 роки тому

      I know people who did the opposite because they wanted glasses... Yeah I don’t get it either

    • @GhostSal
      @GhostSal 3 роки тому

      @@dkcalgary Hi Doctor, quick question. What does “hand motion” mean for a sight diagnosis?
      I was expecting to see 20/20 or 20/200 or numbers the doctor said this is the official way to describe if you are unable to see even the worst case numbers. But I can’t find any reference to “hand motion” in any eyesight medical documentation.

  • @yukidukiii
    @yukidukiii Рік тому +1

    I haven't rubbed my eye over 5 years and I still see well and I got all of them correct and 1 mistake thank you for helping my eyes

  • @meandmyfriend7762
    @meandmyfriend7762 4 роки тому +3

    thanks doctor! im going to eye doctor in next few weeks :D thats helpful

    • @dkcalgary
      @dkcalgary  4 роки тому +1

      Hi, this video just explains the process; it's great that you're going to get check out. DK

    • @desi_paris
      @desi_paris 4 роки тому

      im goining today-

    • @meandmyfriend7762
      @meandmyfriend7762 4 роки тому +1

      @@desi_paris rip

    • @meandmyfriend7762
      @meandmyfriend7762 4 роки тому

      @@desi_paris ive done it,got 7/10

    • @desi_paris
      @desi_paris 4 роки тому

      @@meandmyfriend7762 I got a 200- but my glasses come in soon and i cant wait :D

  • @PatrickWanyonyi-b7x
    @PatrickWanyonyi-b7x 3 місяці тому

    Thank you for this great video. Would you consider adding the legally blind score? is it like 20/200? and also the Ishihara color vision chart.

  • @ashleyjackson6752
    @ashleyjackson6752 4 роки тому +5

    I am so ready and getting nervous about I have my eyes examined on August 4,2020.

    • @dkcalgary
      @dkcalgary  4 роки тому

      I hope it went well! Take care, DK

  • @MayankShukla99
    @MayankShukla99 Рік тому

    Thankyou doctor! Extremely helpful.

  • @mariaelena0828
    @mariaelena0828 4 роки тому +12

    I went to the eye doctor last week and I couldn’t see the E and I started to freak out cuz last time I could read all the way down to 3-5

    • @dkjcb3993
      @dkjcb3993 4 роки тому +2

      😬😬

    • @livsephton9
      @livsephton9 4 роки тому +1

      I went to the eye doctor today and with my left eye I could only see the E and last time I could see the third line. My right eye is unchanged though

    • @josieegold6758
      @josieegold6758 3 роки тому +1

      Oh noo... keratoconus?

  • @Uncle_Andrew086
    @Uncle_Andrew086 9 місяців тому

    Thank you for this. Highly appreciated

  • @jiminiechimbts2082
    @jiminiechimbts2082 7 років тому +73

    My right eye is like... perfect vision but then my left eye is blurry with things farish away with things that my right eye can see.

    • @dkcalgary
      @dkcalgary  7 років тому +10

      HI, make sure you get checked out. DK

    • @urbestayy8196
      @urbestayy8196 4 роки тому +1

      My both eyes also cannot see farish away but when i go to doctor he took my eye test and i answr it clearly but still i cannot see thing from far away

    • @keana8060
      @keana8060 3 роки тому

      Same I get bad headaches and eye aches plus I can’t see at night

    • @skhafijurrahaman9204
      @skhafijurrahaman9204 3 роки тому

      Same in my right eye.

    • @paulallen2680
      @paulallen2680 3 роки тому

      My right eye is near sighted and my left is far sighted

  • @myrmiracle1237
    @myrmiracle1237 2 роки тому +2

    When my eyes in past 10 years doctor praise me because i can read the bottom letter even in far away they said my is like a camera that can 20x optical zoom but now my eye have 300gradient i suggest dont scratch your eyes when its itchy and dont look too much in the sun

    • @dkcalgary
      @dkcalgary  2 роки тому

      It sounds like you should listen to their guidance. I'm sorry to hear you are experiencing vision problems now.

  • @tenzingsannam6625
    @tenzingsannam6625 8 років тому +4

    Thank you doctor. You were very helpful

  • @TRUEEEEET
    @TRUEEEEET 2 роки тому

    Great video. Thank you.
    One question. If they have an eye injury which eye do you start the exam with?

    • @dkcalgary
      @dkcalgary  2 роки тому +1

      Clever question! I usually start with the injured eye as they are less likely to see well with it. Starting with the "good" eye increases chance of someone remembering letters for when testing the injured eye.

  • @agiscobayagiscobay680
    @agiscobayagiscobay680 6 років тому +7

    Thank you..this was very helpful...and u really took your time to explain

    • @dkcalgary
      @dkcalgary  6 років тому

      Thanks! dk

    • @dkcalgary
      @dkcalgary  5 років тому

      Hi, this is good feedback. The key gap I try to fill is explaining WHY different bits of medicine are done the way they are. Some people like that extra context, some don't.

  • @ahmadqudaiesat6940
    @ahmadqudaiesat6940 7 років тому +2

    Thank you! Very refreshing and your efforts in making this video is truly appreciated.

    • @dkcalgary
      @dkcalgary  7 років тому +1

      HI, you are very welcome! DK

  • @user-mv2jm4ff2o
    @user-mv2jm4ff2o 3 роки тому +3

    Today I got my eyes tested and my power increased again
    In my left eye its -4.75 and in right eye its -4.25, but I am facing some kind of problem like I am feeling a little pain in my eyes, but when I close my eyes then it's gone
    Is it because of different powers in eyes or increased power or is it something else

    • @dkcalgary
      @dkcalgary  3 роки тому +1

      You should follow up with your optometrist. Perhaps the prescription is too strong. Take care

  • @Ashu_1311
    @Ashu_1311 3 роки тому +1

    Sir when you zoomed the screen 4:54 I was able to read the last 2 lines. Can I be able to increase ny eyesight ?

    • @dkcalgary
      @dkcalgary  3 роки тому

      I think maybe you should go see an eye health doctor. Take care

  • @oldblackstock2499
    @oldblackstock2499 3 роки тому +4

    This video explained what I had often wondered about. What does 20/20 mean. So now I know that it's for each eye. One eye could be 20/20 and the other 20/30 ,etc. So, I guess someone with good vision in each eye is 20/20 20/20.

    • @dkcalgary
      @dkcalgary  3 роки тому +1

      Hi, generally, I report the score for each eye, then report the score from when the patient does the chart with both eyes open. So it would be something like:
      R: 20/20
      L: 20/30
      Bilateral (both): 20/20-1

    • @oldblackstock2499
      @oldblackstock2499 3 роки тому +1

      @@dkcalgaryI just saw your response today. That's interesting. I'm pretty much blind in one eye abd beed a strong prescription for my good eye.

    • @dkcalgary
      @dkcalgary  3 роки тому +1

      I'm sorry to hear this, but pleased that it sounds like you have good professionals taking good care of you.

    • @Zombies12344bc
      @Zombies12344bc 2 роки тому +1

      My left eye im pretty sure with eyeglasses is 20/20 but my right may be 20/30

    • @Zombies12344bc
      @Zombies12344bc 2 роки тому +1

      I don’t think 20/30 I bad but it best to read below the red line

  • @sergedenovo2389
    @sergedenovo2389 4 дні тому

    Can you please give the dimensions of the chart? Huge THANKS!

  • @Scientist_Albert_Einstein
    @Scientist_Albert_Einstein 5 років тому +3

    Hi, Is this test an optimal test to check for double vision problems with one eye or is the black background and white letters more appropriate to check for double vision problems?
    I have gone to two eye doctors and they put me in front of a digital white screen with black letters; then , they precede to take measurements with the phoropter.
    When my new glasses were ready I noticed that I was having "ghosting of the image" aberration.
    I only notice this aberration when I look at a black background and white letters, but not in the case of white background and black letters.

    • @jakeornot6306
      @jakeornot6306 Рік тому

      I think there is much lacking in the manner in which eye exams are conducted, a travesty in this, the 21st century.

  • @jada9657
    @jada9657 4 місяці тому

    Thanks for this video. What if the patient vision is 20/70 while reading the letters on the wall, but when it comes to using the eye machine their vision is significantly bad. As in they are unable to read the letters in the eye machine?

  • @altheasofhiemarfil1599
    @altheasofhiemarfil1599 4 роки тому +5

    In my left eye, I can't see the letters im just 2 feet away and in my right eye I can see until the letters L P E D is it bad😟😢

    • @dkcalgary
      @dkcalgary  4 роки тому +1

      Hi, I think you should get checked by an eye health professional. Take care and best wishes.

  • @purpleandgold9600
    @purpleandgold9600 8 років тому +1

    My optometrist couldn't decide between 20/15 & 20/10 for my R eye and off the chart for my L eye (Made in blah, etc...). I got a 2nd & 3rd opinions, same thing, but i do need glasses for reading (appointment scheduled).

  • @rodneykuhn249
    @rodneykuhn249 3 роки тому +3

    I couldnt read the top one. My eye doctor was like, Seriously? LOL

  • @chakantaote6013
    @chakantaote6013 3 роки тому

    This is very helpful for my neuroblock now.

    • @dkcalgary
      @dkcalgary  3 роки тому

      Woo-hoo! I hope your block went well!

  • @kalyanpathak7140
    @kalyanpathak7140 7 років тому +102

    with 20 feet away in mobile i cant see even with my glasses

    • @tejashwijha2931
      @tejashwijha2931 6 років тому +8

      Pagal ye to bta do ki mobile me 20feet to dur ki baat h 3 feet se jyada par kch nhi dikhta h

    • @vichitraduniya674
      @vichitraduniya674 5 років тому +1

      Mai soch ab mera aankh gya

    • @sethmartinez6374
      @sethmartinez6374 4 роки тому +1

      BRO SAME

    • @kianamcintyre9671
      @kianamcintyre9671 4 роки тому +2

      @@Stars-gi4ob yeah since the mobile is little probably a few inches even like 1 feet

  • @nurlatifahmohdnor8939
    @nurlatifahmohdnor8939 2 роки тому +2

    Page 567
    Flight attendants must present a good appearance and have vision of at least 20/100, correctable to 20/20.

  • @kanadnemade
    @kanadnemade 4 роки тому +4

    What if the patient have those letter sequence memorized?

    • @dkcalgary
      @dkcalgary  4 роки тому +1

      That can happen. Anytime I suspect it, I get them to do things like, "can you read line 3 backwards for me". DK

  • @NevaehBeatez
    @NevaehBeatez 7 років тому +2

    Is it possible for eyesight to worsen due to infection? I don't know what my visual acuity is but I think I've had an infection for a few months now that may be making my vision worse. My eyes sometimes dry out and get very blurry and feel heavy all the time. I'm going to see an opthalmologist soon but my family doctor says he thinks I have viral rhinitis. Whatever it is, I hope it can be corrected because it's driving me crazy. I always have blurry vision in the morning and keep seeing double.

    • @dkcalgary
      @dkcalgary  7 років тому

      Hi, you should get this checked out. DK

    • @dkcalgary
      @dkcalgary  5 років тому

      It is important for you to see an ophthalmologist or optometrist. I hope you did and your eyes are getting good care.

  • @B.A.Gondal
    @B.A.Gondal 8 років тому +169

    I thought that big E was a dragon from 20 foot.....damn :/

    • @melindago6576
      @melindago6576 5 років тому +7

      lol your comment made me laugh :)

    • @dkcalgary
      @dkcalgary  4 роки тому +10

      :) I think you should drop by your health professional to get tested, though. Take care, DK

    • @desi_paris
      @desi_paris 4 роки тому +2

      sometimes it looks like a D

    • @drakesayshi3321
      @drakesayshi3321 4 роки тому +1

      Last time I tested it actually, I could only read the second one

    • @rodneykuhn7025
      @rodneykuhn7025 3 роки тому

      @@drakesayshi3321 I almost cant read the top E. The eye doctor was like, holy shit.

  • @harshadadhote152
    @harshadadhote152 3 роки тому

    I got -0.75 prescribed yesterday
    I can see fairly everything clearly
    Doc said my eyes are good.
    I wanted to ask when and where I should be wearing the glasses?
    Do I need to wear it while reading on my study table too?

    • @dkcalgary
      @dkcalgary  3 роки тому

      Hi, I'm a family doc, not an optometrist. I think you should ask your eye doc about these questions. Take care!

  • @Omlet221
    @Omlet221 5 років тому +13

    What if you just memorized the chart

    • @kyasmrtist
      @kyasmrtist 5 років тому +2

      Mixup 221 i did that once lol. didn’t work

    • @zaire9947
      @zaire9947 5 років тому +2

      r/madlads

    • @foxxhead1234
      @foxxhead1234 5 років тому

      Mixup 221 LOL

  • @funnnkyk1d
    @funnnkyk1d 7 років тому +2

    this was very helpful.. right before the exam I checked it ✌

  • @himanshukashyap9905
    @himanshukashyap9905 7 років тому +3

    does Snell Chart have 6/5 vision letters in the last line

  • @Randomthings920
    @Randomthings920 2 роки тому

    thank you, I learn a lot. love to see more videos

  • @rodalynastronomo5112
    @rodalynastronomo5112 5 років тому +4

    I’m a high schooler, Since grade 4 I know that my eyesight just a little blurry when I’m on grade 4 I was ok, but when I’m grade 5, my teacher called me then I need to read the sentence I don’t have any glasses because we are poor, my teacher called me and I tried to read the blurry letters that I can see and tell me are you blind? That’s not "has" that is "was" and then my classmate laughed to me because they eyes are good and no problem😔 When I was grade 6 it’s very blurry and I just see letters when I use my glasses, my classmate laughing at me everyday but I pass it, then I’m here now high school😔 my glasses is almost 10 months, I wish I had new glasses😭

    • @KarinaZaman
      @KarinaZaman 4 роки тому +1

      Awww that's so not cool, you shouldn't let everyone put you down like that always stand for yourself no matter what. it's okay to ignore a few times but not too everyone ,you have to call them out and put them in there places before they make fun of anyone like that .like it's not your fault your vision is blurry. Ugh I just don't know why ppl just can be this stupid to joke about it. I actually think glasses are cute :)

    • @desi_paris
      @desi_paris 4 роки тому +1

      that sucks.... yea when i had to copy the notes that are on the screen... I couldt see them. it is so embarrassing and today I have an eye docter apointment im really scared what do i say when i cant see the big letters? "I cant see them?" Idk.....

  • @fileminokilicho3159
    @fileminokilicho3159 3 роки тому +1

    I'm searching this for the purpose of filling out Visual Category Worksheet for one of my student who is totally blind. The problem is that I'm only given three boxes to check: 1)the student has a residual acuity of 20/70 or less; 2) the student's visual field is restricted to 20 degrees or less in the better eye; 3) the student has eye pathology or progressive eye disease that is expected to reduce residual acuity or visual field... I believe that my student should have been given the choice of residual acuity of 20/200 or less, which is not listed as a choice. What should I do? Which of the three aforementioned cases should I check off?

    • @dkcalgary
      @dkcalgary  3 роки тому +1

      I think ask the student to take the form to their eye health professional. It sounds like box 1 is correct (as 20/200 is less than 20/70), but this person may have some nuances to sort out.

  • @kikakim8887
    @kikakim8887 4 роки тому +3

    I cant read 6 with my right eye,and i cant read 7 with my left eye. Is it bad? Should i wear glasses ?

    • @dkcalgary
      @dkcalgary  4 роки тому

      Hi, you may be fine, but depending on your line of work/study, it might make sense to get formally checked. Take care, DK

  • @k.yleenicole
    @k.yleenicole 2 роки тому +1

    Wait, but like i could only read the E at my eye appointment but they said my vision was 20/100? So is it actually 20/200?

    • @dkcalgary
      @dkcalgary  2 роки тому

      If they said it was 20/100, it probably is 20/100. They could have been using a different chart. Take care - I hope they help you with your vision.

  • @kaywill6507
    @kaywill6507 9 років тому +27

    I say Zed and i am from the Caribbean. Hahaa. I enjoyed this video thoroughly. Thank you!

  • @salmaahmed1169
    @salmaahmed1169 3 роки тому +1

    I got an appointment today 😀

  • @MancunianMJ
    @MancunianMJ 6 років тому +7

    My visual acuity is 240p.

  • @arianniforever5350
    @arianniforever5350 6 років тому +2

    Thank you this really, help me as a medical assistant:) in my first day at work.

  • @misschachanaomi
    @misschachanaomi 9 років тому +5

    Very clear explanation, thanks!

  • @kingsburgvisioncareoptomet2954
    @kingsburgvisioncareoptomet2954 8 років тому

    Does anyone here who does VA screening ever us the principle as he explained (time at 6:35) where 20/40-3 now goes to 20/50 but we add +2 showing they did identify a couple in the lower line. Or is it just me?

  • @jltfortress6363
    @jltfortress6363 3 роки тому +4

    Man, im just here to test my eye vision because being a pilot requires good eye visions... Honestly being a pilot is my dream job

    • @dkcalgary
      @dkcalgary  3 роки тому +1

      Make sure you test your vision with an eye professional. This is just HOW to test a patient's vision - it's not calibrated to the right size to test your own vision. Best of luck!

    • @KeonLennedy24
      @KeonLennedy24 3 роки тому

      Same

    • @sweetbeep
      @sweetbeep 2 роки тому

      You can reverse myopia just FYI. They eye doctors will say no, but they are wrong!!

  • @65motowngirl
    @65motowngirl 5 років тому +1

    Very informative. I always wondered how this worked.

    • @dkcalgary
      @dkcalgary  4 роки тому +1

      I'm delighted to be of service! Thanks, David

  • @ammar3094
    @ammar3094 Рік тому +1

    What if you can read the letters but the letters arent crisp and sharp but still readable, do you go off of just what’s readable or whats actually sharp and crisp and has 0 blur

    • @dkcalgary
      @dkcalgary  Рік тому

      It's based on what someone can see, even if blurry. BUT an optometrist can fine-tune things usually on a glasses prescription so there no or minimal blurriness.

  • @rhodz1000
    @rhodz1000 7 років тому +3

    thank you!you made it clear for me..

    • @dkcalgary
      @dkcalgary  7 років тому +1

      Hi, thanks and Nice pun! DK

  • @Zal_-.89019
    @Zal_-.89019 3 місяці тому

    Great video! Thank you