I have heard of people who have had cataract surgery and dont see well. Why?
The most common reasons for poor vision following cataract surgery are conditions that affect the eye and existed before the operation. These might include such things as diabetic damage, macular degeneration, damage to the optic nerve because of poor circulation or glaucoma, previous injury, lazy eye or amblyopia. A small percentage occurs because of surgical complication but the surgical complication rate is one of the very smallest in medicine.