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You are here : AllRefer.com > Health > Special Topic > Aging changes in the senses > Pictures & Images > Sense of sight

Aging changes in the senses

Pictures & Images

Sense of sight

Sense of sight

Vision occurs when light is processed by the eye and interpreted by the brain. Light passes through the transparent eye surface (cornea). The pupil (the black opening in the front of the eye) is an opening to the eye interior. It can get larger or smaller to regulate the amount of light entering the eye. The colored portion (iris) is really a muscle controlling the pupil size. The inside of the eye is filled with a gel-like fluid. There is a flexible, transparent lens that focuses light so it hits on the back of the eye (the retina). The retina converts light energy into a nerve impulse that is carried to the brain and then interpreted.





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Aging changes in hearing

Hearing aids
Hearing aids

Tongue
Tongue

Sense of sight
Sense of sight

Aged eye anatomy
Aged eye anatomy


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Review Date : 2/19/2009
Reviewed By : David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc



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