The feline tear duct is a self-cleaning mechanism that allows cats to maintain visual acuity without the impediment of tear-stained faces. While occasional crusty discharge is a normal byproduct of their cleaning cycle, persistent wetness or colored discharge warrants veterinary attention. Ultimately, the system functions as a silent guardian of the cat's most prized asset: its vision.

One of the most common questions regarding feline tear ducts concerns the dark, crusty accumulation often found in the corner of a cat’s eyes. Is this a sign of a blocked tear duct?

A blocked tear duct causes a condition called , where tears overflow onto the face because they have nowhere else to go. This is common, but the causes vary: Lacrimal Duct Obstruction in Cats - VCA Animal Hospitals

Colored discharge (clear is usually minor; suggests infection).