Depends: Cataract surgery involves the substitution of an artificial lens for the removed and cloudy natural lens. This causes the iris to recede backwards in the eye as the new lens is smaller. This creates a smaller pupil and that is the usual expectation. On your next visit with your cataract surgeon bring this up as perhaps there is some remedy or other cause in your case.
Answered 8/6/2018
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What is the cause: Sometimes eye drops are used at the end of cataract surgery to constrict the pupil which may last for a day. If your surgeon prescribed constricting drops then they will constrict until drops are stopped. Surgical changes to the pupil can occur during the procedure as well.
Answered 7/5/2016
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