My father had a cataract surgery for both the eyes with three months gap, we have used alcon lens and but while in routine check it says still he has sight where he felt difficult to read the small letters, why? Is it even after cataract surgery? We consulted the same doctor who did the surgery but he said this is common and if required they will give glasses. Now father has lot of doubts he feels the eye brightness is not proper and eye sight has come after the surgery now he decided that they have not done the surgery properly. Please suggest.