Pop Eye
Pop Eye is goldfish disease that commonly caused by excess gas in the system, brought about by super-saturation of gas in high pressure water mains. It can also be associated with Dropsy or Ichthyosporidium. Look for bubbles of gas in the eyes, this indicates the bends, as does nervous upset, distress or just odd movements.
Pop-eye that mostly caused by septicemia or tuberculosis. Pop eye is a condition which causes a goldfish's eyes to protrude away from the fish's head in an unusual way. Symptoms of pop eye is one or both eyes protrude from the head in an unusual fashion. Treated fishes eyes may remain enlarged after treatment since the underlying tissue may remain stretched.