Dear Mr. Sinjab, Two questions: - case 3 with -6/-2/180. Why don't you consider the effect of the -2 astigmatism on the K readings? - case 4 with -2/+3/180. According to your part 3 of "Understanding Corneal Refraction", section "ablation depth and K-reading correction", one should use the + equation, apply the plus on the flat K, then apply the minus on both Ks. Why proceed in a different way in this clinical example? Best regards and many thanks.
Hi dr. mazen thank you very much for this useful videos, but I have the same question of dr. carla which has written down in comments: in case 4 with -2/+3/180. According to your part 3 of "Understanding Corneal Refraction", section "ablation depth and K-reading correction", one should use the + equation, apply the plus on the flat K, then apply the minus on both Ks. Why proceed in a different way in this clinical example?
First i would thank you Dr sinjab for this work...its mazing.. i wnat to ask something althoug, in the hyperopic profile of lasik, you see that tah ablation depth was =0, why did you proceeded into calculation PTA, what if PTA was ok with this Zero adpation...!! what you would do..!!!?
+ahmed lubbad Thank you for watching the video. In zero central ablation the PTA will be affected by the central thickness and flap thickness, so if the surgeon uses a thick flap in a thin cornea, the PTA will be high.
Thank You very much, Dr Sinjab for your excellent work! It's amazing indeed!
جزاكم الله خيرا واحسن اليكم ورضي عنكم على هذا العلم النافع
Dear Mr. Sinjab,
Two questions:
- case 3 with -6/-2/180. Why don't you consider the effect of the -2 astigmatism on the K readings?
- case 4 with -2/+3/180. According to your part 3 of "Understanding Corneal Refraction", section "ablation depth and K-reading correction", one should use the + equation, apply the plus on the flat K, then apply the minus on both Ks. Why proceed in a different way in this clinical example?
Best regards and many thanks.
Dear Carla,
Sorry for the delay as it seems I missed the message.
Please send me your questions on:
mazen.sinjab@yahoo.com
i asked myself the same question!!
Merci pour votre Soutien, je vous considère comme référence.
Merci infiniment
Hi dr. mazen thank you very much for this useful videos, but I have the same question of dr. carla which has written down in comments:
in case 4 with -2/+3/180. According to your part 3 of "Understanding Corneal Refraction", section "ablation depth and K-reading correction", one should use the + equation, apply the plus on the flat K, then apply the minus on both Ks. Why proceed in a different way in this clinical example?
First i would thank you Dr sinjab for this work...its mazing..
i wnat to ask something althoug, in the hyperopic profile of lasik, you see that tah ablation depth was =0, why did you proceeded into calculation PTA, what if PTA was ok with this Zero adpation...!! what you would do..!!!?
+ahmed lubbad Thank you for watching the video. In zero central ablation the PTA will be affected by the central thickness and flap thickness, so if the surgeon uses a thick flap in a thin cornea, the PTA will be high.
بارك الله فيك يا دكتور
ونفع بك
baraka allah fikom , w djazakom ana kol khair
regarding the case no 4 in part 2 (+1/-3 @180) is it possible to do PRK?
thank you sir.
I usually do not correct any hyperopia by PRK