There could be several reasons for CAT winking the eyes. The most compelling reason is the means of communication; merely, the cat is trying to convey sincere expression. Cats being the sensitive creature have many other ways to demonstrate emotions while using their body talking especially with tail, ears, and eyes.
Secondly, it could sign any growing infection that can occur with some related symptoms such as ocular discharge, irritation, inflammation, and redness in the eye membrane.
So, how to conclude the statement? Several possibilities are there to make assumptions about this happening about your cat. Still, the better approach is to study your pet’s behavior carefully to identify the cause of the regular winking habit of your cat.