vision from the special senses

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Special senses of vision takes place through eye. Light enters from cornea of the eye. The cornea bends the light and then light passes through pupil which is an opening in iris. The iris acts like a camera shutter, depending on the intensity of light it enlarges and shrinks. After iris light enters lens which is a transparent and flexible structure in eye that shortens and lengthens it's width in order to focus the light. After lens light rays passes through vitreous humour which is a clear gel like substance and then light strikes the retina where image gets formed. The retina then transforms the image into electrical impulses which is carried to the occipital lobe of brain via optic nerve. The brain then processes the image and the vision happens i.e one is able to see. There are two types of photoreceptors in the retina: Rods and Cones. Rods are responsible for vision in low light and Cones are responsible for vision in bright light and Cones are also responsible for colour vision.

Sydney Mullin answered 1 year ago

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