Hi and Welcome to YT!
Dogs have a third eyelid, and this can become everted (folds wrong so it won't completely disappear back into the corner of the eye) either from trauma or disease. When any of mine have this, I use a sterile eye lubricant (Artificial Tears, human kind, NO Visine ever) as long as no sign of infection is present. Sometimes it helps. If anything else is present, I would have a vet look at it, and if it gets worse or irritated, surgery may correct it. |