Over the past few weeks my Achilles tang's eye has been getting progressively worse. It started out just being kind of cloudy and has become more protruded. Right at the end of the video you can see how extended it is. None of the other fish are showing any of the same symptoms and he's still eating and behaving pretty normally. What should I be doing to help? I'm hoping @fishdoctor may chime in if he's got any experience with this.