Blindfold is a common disease of large fish. When blindfolded, the fish's eyes seem to be covered with a layer of white gauze. If left untreated for a long time, their eyes will have some problems. Blindfold is not a serious disease. It's not really a disease. Blindfold is mostly due to bacterial infection.

It is necessary to change the fresh and sterile water source in time to avoid serious bacterial infection.