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The lens, which sits behind the iris, changes its shape to focus light onto the retina. Small muscles (ciliary muscles) contract to cause the lens to become thicker, which allows the lens to focus on nearby objects. In cats,
these lens changes appear limited. The ciliary muscles relax to cause the lens to become thinner when it focuses on distant objects. The retina contains the cells that sense light (photoreceptors). The 2 main types of photoreceptors are cones and rods. Cone cells give cats excellent visual acuity and binocular vision, allowing them to judge speed and distance very well, an ability that helped them survive as hunters. However, although the cone cells are also responsible for color vision, it is uncertain whether cats can see colors. Cats also have many rod cells, which are good at collecting dim light. In fact, cats can see 6 times
better in dim light than people, giving rise to the myth that cats can see in the dark. Cats also have a reflective layer called the tapetum lucidum, which magnifies incoming light and lends a characteristic blue or greenish glint to their eyes at night.
Square Enix. Archived from the original on October 13, 2023. Retrieved September 1, 2023. ^ その着せ替え人形は恋をする 12 特装版 オリジナルアクリルジオラマ付き (in Japanese). Square Enix. Archived from the original on October 13, 2023.
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