To some extent, cats also have double eyelids and single eyelids, although this statement may not be accurate or fully applicable to cats. It is common to describe the appearance of an animal's eyes as similar to that of a human eye, but this is not entirely accurate in practice.
Humans often use the terms "double eyelid" and "single eyelid" to describe the physical characteristics of the eye. Double eyelids usually refer to having a prominent eyelid crease at the eyelid that makes the eye appear to have two layers of eyelids. A single eyelid means that there are no such folds and the eyelids are relatively flat.
However, for cats, their eye structure is different from that of humans. Cats' eyes often have different shapes and characteristics, so it may not be accurate to classify them simply as "double eyelids" or "single eyelids". Their eyelid anatomy differs from that of humans, and they usually have fewer distinct folds or cosmetic features that resemble humans.
However, some cats do have a slight crease on the eyelids, which may be reminiscent of the concept of double eyelids, but this is not common and can vary depending on the breed of cat, genetic factors, or individual differences.
What's more, cats' eyes may have unique features in appearance, such as the shape of their pupils, the color of their eyes, the contour of their eyelids, etc., which are all unique beauty features of their own, rather than simply corresponding to "double eyelids" or "single eyelids".
Overall, it is not accurate to simply describe a cat's eyes as "double eyelids" or "single eyelids", as this statement does not fully apply to describe the characteristics of an animal's eyes. Cats' eyes are diverse and beautiful, and each cat has a unique eye appearance, which is one of their fascinating features.