Do sudden light changes cause temporary blindness?

[HopeInHeart]

I went up to my room tonight and flipped on the light and immediatly began to feed my fish their tempting brine shrimp. Noel was swimming back and forth against the side, and didn't seem to see it, which was VERY unusual. 6 out of the 7 bettas didn't seem to see it, and if they did, it seemed to scare them. Only one, Aqua, actually ate. The room was in total darkness before I turned on the light. Has anyone else noticed this? Should I have a small light on them during the day?

[dramaqueen]

They don't like going from darkness to bright light. When you do that give them time to get used to the light before feeding.