Kittens don’t open their eyes until they, on average, seven to ten days old and begin using their sight at about three to four weeks, mainly to get back to momma. Kittens are all born with baby blue eyes and during the first few weeks they steadily change to their permanent color. A cat has a field of vision of 186 degrees which far exceeds than of a human being that is one reason why you are not able to sneak up on a cat. But cats do have poorer daytime vision than humans; night time is the right time for their specialized eyes to do their magic.
The pupils of cat’s eyes not only dilate in express relation to light and dark as a human eye does but they also change with the feline’s mood. When the cat is afraid or excessively excited the pupils dilate. Contrary to popular belief cats are not completely colorblind, they can't see as many colors as humans but they can most assuredly see some. They have a keen vision for distant items but up close some things can appear blurry.
The size of a cat’s eye is somewhat larger than that of a human which allows the pupils to be larger. In the main their eye lens is more curved which facilitates them to focus more sharply. Cat’s eyes open and close much faster than do their human staff and they don’t need to blink to keep their eyes lubricated. Felines squint as a form of communication. On the backside of their eye they have an extraordinary membrane called the tapetum lucidum which increases the quantity of light caught by the retina. As light is reflected off this membrane it makes the cat’s beautiful eyes glow mysteriously.
When a cat is ill, their eyes show it. They appear dull and dry. It is very imperative to keep your cats eyes clean and healthy for their well-being. Opticlear Eye Wash is quite inexpensive and lasts a long time as well. It is a sterile solution with the same PH as ordinary tears and can be used to wash dust, dirt, allergens and irritants from your cat’s eye.
Cats do not like long-drawn-out, express eye contact. Staring at them for lengthy periods of time can make them feel in jeopardy and frightened.
Cats also have outstanding peripheral vision. They typically do not stare openly at something unless it is prey they are about to pounce upon. Knowing a bit about how a cats eyes work can help you understand them better and also keep them in good health.