Goldfish with a sore eye

[clydeserani]

One of my Goldfish has what looks like a bubble or blister over its right eye. It appears more swollen at the bottom of the eye and it sticks out a few millimetres. It is cloudy pink in colour. Any ideas what this could be and how I would treat it.?

[Rosie1974]

I had a goldfish with a similar thing. It looked like the black pupil had a bubble around it and the eye was swollen. She didn't seem bothered by it so I never treated it. I asked a professional and they said it could be tiny worms causing it. However I have had lots of goldfish and occasionally 1 develops a cloudy eye, it doesn't seem to bother them and they have lived for years like it.