Do you remember when I told you about that fluffy little white dog named Sprite who is at the Humane Society shelter? She is one of the dogs I said you should adopt. Anyway, she had cherry eye in both eyes, and she got her eyes fixed by Dr. Michelle, who is one of the vets at the shelter. But now the cherry eye came back in one of Sprite's eyes, so it will have to be fixed again.
First of all, you need to know about the nictitating membrane, which is also called the "third eyelid." A lot of reptiles and birds have this third eyelid, but most mammals just have a little bit of one that doesn't really do much. Except for a few mammals, like camels, for example, who use this membrane to cover their eyes and protect them from sand. And polar bears have it, too, which keeps them from getting snow blindness. One interesting thing about the nictitating membrane is that it goes across the eye from side to side, instead of up and down like regular eyelids. And another interesting thing is that "nictitating" is a hard word to spell and to pronounce!
Okay, well, that's mostly all I learned about cherry eye. There are a lot of really gross photos of cherry eyes on the internet, but I tried to find some that weren't too incredibly yucky. The main thing to remember is that if this condition shows up in your dog or cat, you should have it fixed right away before that gland gets all swollen and infected.
And now I'm just going to go close my eyes and take a little nap!