Eye lid drop after cataract operation

it is not uncommon to have a droopy lid after any type of eye surgery:  cataract, glaucoma, retina.  When the surgery is done, a speculum is placed to hold the lids open.  This may cause some stretching of the muscles so that the lid will appear lower.  The lid may slowly come back up to its' normal position. So give it more time.  If it does not after about 6 months you may want to have it surgically lifted.      

We can't tell you why this occurs.  There are many theories.  Generally because this can recover, it is best to give this 6 to 12 months to resolve on its own before deciding that you need to do something about it.

This can happen after cataract surgery. I would recommend waiting for 3 months after the cataract surgery to see if it improves before considering surgery to correct the eyelid.