After retinal detachment surgery, is it normal for your eye to hurt months later?

Possibly: Pain can occur months later. Pain is more commonly associated with scleral buckle surgery or long term silicone oil.

It depends: It depends what kind of surgery was necessary for your retinal detachment. Scleral buckle can be a source of irritation months later, but severe pain is never normal. You must be followed by a retina specialist and ask them for their opinion based on an actual examination.