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Eye rods and cones diagram8/31/2023 ![]() ![]() Optic disc: the visible (when the eye is examined) portion of the optic nerve, also found on the retina.When the eye is directed at an object, the part of the image that is focused on the fovea is the image most accurately registered by the brain. Fovea: forms a small indentation at the centre of the macula and is the area with the greatest concentration of cone cells. ![]() Macula: a yellow spot on the retina at the back of the eye which surrounds the fovea.The retina works much in the same way as film in a camera. There are between 6 and 7 million cones in the eye and they are essential for receiving a sharp accurate image and for distinguishing colours. Cones, on the other hand, function best in bright light. The human eye contains about 125 million rods, which are necessary for seeing in dim light. It is composed of light sensitive cells known as rods and cones. Retina: a light sensitive layer that lines the interior of the eye.Ciliary body: the part of the eye that connects the choroid to the iris. ![]() It also contains a pigment that absorbs excess light so preventing blurring of vision.
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