A medical condition where an eyelid (usually the lower one) turns outward, exposing the inner surface and potentially causing irritation and tears.
From Greek 'ektrope' (a turning out) + Latin '-ion'; describes the literal eversion or outward turning of the eyelid margin.
Ectropion is one reason dogs with droopy faces have health problems—their turned-out eyelids can't keep eyes moist and protected, which is why selective breeding for extreme features raises real ethical questions!
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