Cats usually “wink” either as a relaxed, friendly signal (similar to the slow blink “cat kiss”) or because something is briefly bothering or lubricating the eye, like dust or the inner third eyelid moving.

Cute reasons cats wink

  • A slow, soft wink or slow blink often means your cat feels safe and content around you, sometimes called a “cat kiss” or sign of trust.
  • Cats may learn that humans respond warmly to this look, so they repeat it as a bonding gesture.
  • When your cat is lounging, relaxed body, tail calm, and gives a one‑eye blink, it is usually friendly communication, not a joke or mockery.

Physical / eye-care reasons

  • Cats have a third eyelid (nictitating membrane) that helps protect and lubricate the eye; when it moves or the eye clears debris, it can look like a wink.
  • Occasional one‑eye blinks can simply be the eye moisturizing, clearing dust, or adjusting to light, especially after sleep.

When to worry about a wink

  • If the “wink” comes with redness, swelling, discharge, squinting, pawing at the eye, cloudiness, or your cat keeping one eye shut, it can signal issues like conjunctivitis, allergies, or a corneal ulcer.
  • Frequent winking on the same side, or signs of pain or behavior change, should be checked by a vet to rule out infection or injury.

How to respond to a cat wink

  • You can slowly blink back at your cat; many behaviorists and vets note this can reinforce a calm, trusting bond.
  • Keep an eye on (but don’t obsess over) the frequency: relaxed, occasional winks are normal; changes in the eye’s appearance or comfort level call for professional advice.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.