Dr Oyakawa,
I am not sure I understand the SIA correctly. My interpretation is that the SIA can be used to offset pre-exist astigmatism during the cataract surgery.
More important, I want to confirm this will not introduce any more incision to the cornea.
I am planning to have a cataract surgery and struggling should I correct the -1.75 astigmatism with yellow tint Acrysof.
If there is a way to lower my astigmatism a bit, I think I am happy to let the glasses to correct the rest of my astigmatism.
Another question : Will the SIA increase my astigmatism make it even worse ?
I have some weir sensation after the RD surgery. I found when there is an object like a person stand close to me, part of him within my glasses and part of him outside my glasses, the size of the portion outside my glasses is larger than the one within the area of the glasses and my brain has problem to connect them. This cause me some headache. I hope my astigmatism will not increase or better to decrease for some extent after the surgery
Thanks in advance
Dr Oyakawa makes some calculations including SIA in his youtube video:
http://www.youtube.com/watch?v=9mWEkwGaa9Y