My beta that we purchased a couple of weeks ago has an eye problem all of the sudden. It looks like his eyes have bubbles on them or something. Very odd! I need to know what this could be and how to rid him of it.
Sounds like popeye. Keep his water extra clean, daily 75-90% water changes would be good for awhile. I've heard people have good luck with Maracyn-two.
Best of luck and welcome to the forum
Here's a link from this forum that has pictures of a betta with popeye. It has some info in it too that might be able to help you out. Hope he feels better!