I'm guessing the second part of the test must have to do with the speed of neural stimuli between the brain and the visual cortex. I've never had an optometrist turn my head side to side like that though. With 20/8 VA, I usually can exceed beyond the bottom line of most charts.
Thank you for sharing this video. As an FYI, this eye chart may not be ideal. In addition, 2Hz, as stated, is the correct speed for the head movement. However, this video appears to demonstrate the head moving greater than 5 Hz. Finally, the neck should be flexed 20 degrees prior to doing the test.
Yeah, I understood that. So 2 Hz should mean he should have to "Cycle" the persons head Two times in 1 second right (Left, Right, Left, Right) all in one second. In order to do that you'd have to be moving the head fairly quickly? Or is my logic off?
It's there something called DynamIc Vision that allows the person with this skill to better perceive fast moving objects? This is mostly something in China, but you can supposedly train the ability by being put in a fast moving spinning machine and practicing keeping your focus on a stationary object outside of the machine. Exactly what kind of spinning is necessary, I am not sure, but I have heard stories that it's fast enough to make you puke, everytime. The point being... That other than visual clarity, there are other skills and abilities you can develop with your eyes. Nothing crazy like looking at the crack of dawn to cultivate shooting fire from your eyes... But something a martial artist or soldier would really benefit from all the same.
I'm guessing the second part of the test must have to do with the speed of neural stimuli between the brain and the visual cortex. I've never had an optometrist turn my head side to side like that though. With 20/8 VA, I usually can exceed beyond the bottom line of most charts.
Wouldn't it be better if the words are moving instead of moving the head ?🙂
Nops. As test is performed for vestibular ocular reflex. If head is static and letters are moving then it is useless
Thank you for sharing this video. As an FYI, this eye chart may not be ideal. In addition, 2Hz, as stated, is the correct speed for the head movement. However, this video appears to demonstrate the head moving greater than 5 Hz. Finally, the neck should be flexed 20 degrees prior to doing the test.
conveyorbeltz1 what are you using to measure how quick the head moves? I was wondering myself how to figure this out
+Ty_tastic you can use a metronome or know that two head turns a second is 2 hz. One head turn a second is one hz.
Yeah, I understood that. So 2 Hz should mean he should have to "Cycle" the persons head Two times in 1 second right (Left, Right, Left, Right) all in one second. In order to do that you'd have to be moving the head fairly quickly? Or is my logic off?
+Ty_tastic you are correct.
+Ty_tastic you are correct.
It's there something called DynamIc Vision that allows the person with this skill to better perceive fast moving objects?
This is mostly something in China, but you can supposedly train the ability by being put in a fast moving spinning machine and practicing keeping your focus on a stationary object outside of the machine.
Exactly what kind of spinning is necessary, I am not sure, but I have heard stories that it's fast enough to make you puke, everytime.
The point being... That other than visual clarity, there are other skills and abilities you can develop with your eyes. Nothing crazy like looking at the crack of dawn to cultivate shooting fire from your eyes... But something a martial artist or soldier would really benefit from all the same.
So, is this helpful for diagnosing bilateral vestibulopathy? And does it cover proprioceptive function, too?
can only see the 6th line up,
What is the ideal size of chart?
Lol this is a funny test
hehe yeah, i came here from a comment underneath a haikyuu episode