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It is the light sensitive back curtain of an eye. It contain photoreceptor cells called rods and cones. It captures incoming light and then send those electric signals to brain through optic nerve to create images. Cones are responsible coloured light and sharp vision while rods process black and white light and this help us see in night.
Macula is a central 5 mm area of retina which is responsible for sharp cantral vision, colour vision. Macula has highest density of photoreceptor cells especially cones.




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