I was wondering if anyone has any experience with a completely blind fish. I have a butterfly telescope, Her name is Midna. I have had her for over a year and when I got her shes seemed normal but was having problems finding food. I noticed that I could almost look completely through her pupils. Like it wasnt solid black like a normal fish so I thought maybe she was blind. The only visual stimulation she reacted to was me turning the tank lights on and off. Now she no longer reacts to even that. Shes as healthy as can be but spends most of her time around one spot. She still has trouble finding food but she gets around. Can a goldfish that is partially blind go totally blind? If so any advice on how to make their life as good as possible?