Why Do Cats Have Reptile Eyes?

Have you ever looked at your cat's eyes and seen that they kind of look reptilian? Because unlike humans, cats have strange vertical pupils that can turn into tiny black slits or turn into enormous black circles. Now, the main reason has to do with light. See, a cat's pupils can change shape depending on how bright their surroundings are. During the day, their pupils shrink into tiny vertical slits, helping limit the amount of light entering their eyes. But at night, they expand dramatically to let in more light. This helps cats see much better in dim conditions. But the next reason is even more crazy, because those vertical pupils aren't just useful for seeing in the dark, scientists believe they also help cats judge distances when hunting. Their vertical pupils provide useful depth information especially when they're crouching low to the ground, so when your cat is staring at a random bug for 5 minutes, it's actually using some pretty advanced hunting equipment. Another crazy thing about cats' eyes is that they glow in the dark, but why is that? Well, cats actually have a special reflective layer behind their retinas, and this layer reflects light back through the retina, giving the eye another opportunity to detect it. It's one of the reasons cats can see so well in dim lighting, and it's also responsible for that creepy glowing eye effect. But the main question is, why don't lions and tigers have vertical pupils, but cats do? Scientists believe this difference is related to how these animals hunt and their position relative to the ground. Smaller ambush predators tend to have vertical pupils while larger predators often have round pupils, and even though they're all members of the same cat family, their eyes have evolved differently. Despite what you might think, cats cannot see in complete darkness, they still need a little bit of light. However, thanks to their large pupils, light-sensitive eyes, and reflective eye layer, they can see in much dimmer conditions than humans, and that's why your cat can walk around the house at night while you're struggling to find the light switch. So, the next time you see your cat looking at you with those creepy reptilian eyes, just remember that their eyes are just more more advanced than yours. Anyways, if you found this video helpful, be sure to subscribe, like the video, comment what you think, and check out all my other videos. Thank you so much for watching, and I'll see you in the next video.