It might Die from all the meds before any history breaking eye surgery can take place. Ice the parts. In theory eye should just pop out ? long nose fine clamp pliers to hold below were cutting. Cut & cauterizing with a burning insent stick. Then release. Sounds pretty easy and all equipment needed is in most homes or can buy from cheap shop. History is made. OR A BLOODY GREAT MESS and one very sore FISHY. After Furan 2 its most probably dieing of some thing completely different right now.
fish are a bit like chickens. Nasty creatures that seam to enjoy inflicting plenty of pain on to each other with eye losses being a common thing with no surgical equipment other then their beaks.