How long has it been like this? How old is the fish? Tankmates? Post ur water parameters and ph too. Would suggest adding some salt and maracyn2. Make sure the tank water is pristine.
Fish can become blind from an ick, bacterial, or fungal infection or from a fight with another fish. and they can lead semi normal lives after.
I had a pair of blind nics that spawned 3 times after becoming permanently blind, and had no problem raising fry.
How long has it been like this? How old is the fish? Tankmates? Post ur water parameters and ph too. Would suggest adding some salt and maracyn2. Make sure the tank water is pristine.