Why do cats blink in one eye? A cat's single-eyed blink is an act used to express emotions, just like human eye contact. They may be expressing tenderness, friendlyness, pleasure or fear, depending on the language and environment of their body.

Cats blink with one eye from time to time may feel uncomfortable with that eye, such as eyelashes and dust, or conjunctivitis, keratitis, etc. The owner carefully observes the cat's eyes condition and whether there is any congestion or increased eye boredom.

If the cat blinks one eye and disappears after a while, it means that it may have been stimulated by foreign objects, so don't worry too much. If your cat's eyes are congested, eye bores increase, and tears continue, you need to see a doctor.