Essay On Non Human Primates

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Pages: 4

One key feature that non-human primates depend on is their eyesight. Non-human primates rely on their vision almost as much as humans do but if their vision was taken away they would be able to adapt a lot easier than humans would. We rarely think about our vision, how it works and how It compares to other animals on the planet. Some people may assume that other animals see just the same as us humans but there are some differences between the way humans and nonhuman primates see the world. In order to see humans, have what’s called a cornea that focuses light onto this light sensitive structure called the retina. Once the cornea focuses most of the light it goes through the lens which focuses it even more. Behind the cornea is ring shaped structure called the iris. Inside the iris Is a circular …show more content…
The pupil gets bigger and smaller to control how much light your eye is exposed to. We also have these muscles in our eyeball called ciliary muscles. Ciliary muscles surround the lens and hold it in place. When the muscles relax they pull and flatten the lens so that the eye can see objects that are far away. To see the closer objects the lens must thicken. Inside the retina are light sensitive cells that come in two main different forms which would be the rods and cones. The cones help your vision in the poor light and rods help sharpen your central vision. (Former 2016) Vision for non-human primates works a little bit differently than human vision because it varies. Sometimes you see primates in the same species even who have different vision perceptions than other members of their species. Most humans, apes and old world monkeys are trichromatic which means they see three colors. This is very helpful for most primates except nocturnal ones because they would still need the daylight to really see the colors. The cones in their eyes allow them to see different blues, greens and