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 ...
Read More

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 ...
Read More

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, ...
Read More

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 ...
Read More

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 ...
Read More

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 ...
Read More

Cat born without irises

Louie was born without irises and tear ducts. His congenital condition is called aniridia. The picture of him is startling ...
Read More
Please comment here using either Facebook or WordPress (when available).
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.

Leave a Comment

Recent Posts

What kind of water bowl is best for cats?

The kind of water bowl that is best for cats is either glass, ceramic or…

4 hours ago

Substantial number of people give Covid-19 to their companion animals

There have been a few studies on this subject unsurprisingly. It is obviously highly pertinent…

8 hours ago

People prevented from feeding stray cats in the UK

This is an extraordinary development as far as I am concerned. Councils in the UK…

8 hours ago

I can feel my cat’s spine when I pet him

If you can feel your cat's spine when you pet him, he might be underweight.…

1 day ago


The title is in Japanese. It means: 7 shironeko (7 white cats)...which is not true…

1 day ago

New Zealand: man who trapped and drowned eight cats thought he was doing the right thing

ANALYSIS AND NEWS - WARNING: this content may upset some people so please don't read…

1 day ago