Poor thing.....

I myself personally,would allow nature to take its course,and let the eye do what ever it ends up doing.I would also isolate it in another take too,so that noone would have the opportunity to pick at it and make things worse.One of mine was the same way,and that's what I did.I put him in a 10 gal,so I could change the water everyday,and a 0.1% salt level.The eye fell out,which was pretty gross,but because of the params,no added stress etc,he seemed to fare well ,almost like nothing ever happened.