Hi, I just read your post, and I have posted one almost just like it yesterday! Can you tell me how it turned out for you? Thanks!
You need to see your retina surgeon on Saturday if possible or Monday at the latest. It could be a suture, part of the scleral buckle, an exoplant or irritation from the incision site for an infusion port.
JCH III MD
In the mean time you can use artificial tears or ointment.
Suture would feel like something in the eye, dirt sand or foreign body?
(I assumed you have tried artificial tears for lubrication without refief)
Does it look like a bubble on the white of your eye?
Either way new changes/problems(especially the very irritating type) warrent an appointment to your retinal surgeon