Health
Entropion
An eyelid that rolls inward so the lashes and coat rub against the eyeball — painful, common in loose-skinned and heavily wrinkled breeds, and fixable with surgery.
The eyelid is meant to sit against the eye, not curl into it. When it curls, hair scrapes the cornea with every blink. A dog with entropion squints, waters, and shies away from bright light, and the constant abrasion can scar the cornea enough to cloud vision.
It follows facial shape, which is why it clusters in breeds bred for heavy folds and deep-set eyes. Correction is a small piece of eyelid surgery and it is usually permanent, but it is worth diagnosing early: the damage a rolled eyelid does is cumulative, and no amount of drops fixes the geometry.
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