Why do cats see at night but daytime sightings?

Cat's eyes have a wide viewing angle of 200 degrees and rod cells are 8 times more than human eyes, so it is capable of looking good at night , objects are long-range but when viewed close and looking at objects in the daytime is poor more than human eyes due to fewer cones.

At the same time, the sunset and night cats also have a better vision than the human eyes.Because its eyes have rod-shaped cells, a type of light sensitive cells , 6-8 times more than humans. Rod cells also allow cats to feel the movement in the dark much better.

In addition, according to veterinarian researcher Kerry Ketring, cat eyes have an elliptical shape, large cornea and Tapetum tissue layer - a layer of tissue that can reflect light back into the retina, so it can help cats collect Cross light much better. The Tapetum tissue can also change the wavelength of light that makes prey or other objects 'shadowing' on the night screen more prominent in the sight of cats.

However, cat eyes are not the only advantage. While the human retina has 10 times more cones than cat eyes, it allows people to look better in light. ' Humans discover things that are 10-12 times better in light than cats or dogs, because daytime vision is a function of cone cells,' Dr. Ketring said.

The human eye also has 3 types of cone cells that allow the eye to see a variety of colors, especially vivid colors like red, green and blue. While cats can have three types of cones but the number and distribution of each type are different. In behavioral tests, it seems that cats cannot see the full range of colors like humans.

Cats are able to look good at night and far away objects.(Photo: fanpop.com)

Some experts believe that cat eyes are limited to colors such as blue and gray, while some experts believe that it can look at colors similar to dog eyes but with less intensity. color.'Dogs look less colorful than people and cannot distinguish objects yellow red, green and orange. While the fish can see the ultraviolet wavelengths that humans cannot see , 'Kertring explained.

At the same time, the human eye is also visible with a much larger resolution and a larger range for vivid colors thanks to cones in the eyes. While people clearly see objects at distances of 30-60 meters, cats need more than 6 meters to see clearly.Because cat eyes lack the muscles needed to change the shape of eye lenses, it is difficult to see nearby objects.