Clown Fish with Pop Eye (?)

My ocellaris clownfish has pop eye (I think). It looks like his eye has turned blue and is being forced out of his socket by an air bubble. Is that pop eye? I had a protein skimmer running recently and there were a ton of micro bubbles in the aquarium. Amm: 0, Nitrite: 0, Nitrate: 15, PH: 8.1, Specific Gravity: Unknown (I only have an old hydrometer currently- it said 1.024.) He appears to be healthy otherwise. Is there something else it could be? Thank you for your help.

 

I'd look up pop-eye on internet and if it looks like it, take him out and medicate him in a quarentien tank.

 

don't see the picture!

 

Ya, the picture is messed up.