write the functions of Iris, Lens, Retina
Answers
Explanation:
Lens:the transparent structure suspended behind the Iris that helps to focus light on the Retina;it primarily provides a fine tuning adjustment to the primary focusing structure of the eye,which is the Cornea
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Cornea is the membrane covering the front of the eye that is bulged out and is responsible for the maximum refraction of the light that enters the eye.
Iris forms the coloured part of the eye. It adjusts the size of the pupil, thereby controls the amount of light entering the eye.
Pupil controls the amount of light entering the eye
Ciliary muscle helps in adjusting the focal length of the lens by contraction or relaxing.
Retina is actually a canopy of the nerve endings of the optical nerve through which images are converted into electrical impulses and transferred to the brain for realization of the image.
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