Categories: cat eyes

Picture of cat with wide open pupils

This is a really nice picture of a cat, actually a cat with a big following on Twitter whose name is Curious Zelda, with wide open pupils because it was taken in low light conditions. You can click on it to see it in large format.

Picture of cat with wide open irises

There is often a confusion between pupils and irises. The iris is the sphincter muscle which is pigmented and which opens and closes the aperture (the pupil) through which light passes to the retina via the lens.

I like good pictures of cats and this is one of them. When the iris contracts and the aperture becomes smaller it goes from round, as you see in the photograph, to an oval shape and then finally a slit. The slit is important because it allows the cat to use her eyelids to half close over the slit to make the pupil even smaller. This is important because the cat’s eye is sensitive to light. We know this because cats see well in low light conditions. It becomes black-and-white vision but relatively good vision thanks to an abundance of rod cells in the retina.

If you click on this link you can see how domestic cats see. It is interesting to see the world through cats’ eyes.

Are cats’ eyes more sensitive to light?

Yes, cats' eyes are more sensitive to light than those of humans. This is why they shine in the dark ...
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Why do domestic cat eyes reflect light?

The domestic cat has a tendency to be more active at night although they are not wholly nocturnal. They are ...
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Do cats see ultraviolet light?

The question in the title is probably meant to mean: do cats see objects under ultraviolet light only? For humans, ...
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Can cats see infrared light?

Cats cannot see infrared light because it is not part of the visible spectrum. In this way cats are identical ...
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Is this cat wearing eye makeup to make her eyes look more feline?

This is a strange picture of a cat. Her eyes have what appears to be makeup on the outside edges ...
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How many eyelids do cats have?

Domestic cats have three eyelids. I will explain where they are. There is one eyelid above the eye which comes ...
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Cat born without irises

Louie was born without irises and tear ducts. His congenital condition is called aniridia. The picture of him is startling ...
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Michael Broad

Hi, I'm a 71-year-old retired solicitor (attorney in the US). Before qualifying I worked in many jobs including professional photography. I have a girlfriend, Michelle. I love nature, cats and all animals. I am concerned about their welfare.

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