'swollen' eye

I have a tank with 3 skirt tetras (Glofish) and a Chinese Algae Eater. They have some plants, toys, and a filter. A while ago I noticed one of my fish had an eye that popped out more than the other eyes and the ones of the other fish. Does anyone know why this is happening and how to fix it? (Orange fish is the puffy eye, green fish is how they normally look)

Here are the pictures of Orange fish

I have had similar on a tetra. Growth or injury
In my case plenty of clean water and no further treatment did the trick. It took around 10 days to clear. There did not seem to be any improvement along the way (the fish looked otherwise healthy and was eating normally) and one morning he was suddenly fine.

It appears to be Popeye. Keep her in clean water. I treat with Kanaplex and Furan-2 for Popeye. I also make an epsom salt bath of 1 tablespoon epson salt dissolved in a gallon of tank water. Allow fish to stay in the bath for 20 minutes. Then move her back to her tank. You can do this 3 times a day. The epsom salt will pull fluid off the eye.