The Human Eye

Title: The Human Eye
Category: Science & Technology
Details: Words: 702 | Pages: 3.0 (approximately 235 words/page)

The Human Eye

3 Tunics of the Eye 1. Fibrous tunic – outer protection and support. a) cornea • anterior 1/3 of eye • non-elastic (it has the same constant refractory index) • consists of high amounts of collagen fibers • only organ transplanted from one individual to another without rejection • for light refraction (light bending),(most important. feature regarding refraction) • cornea and lens are involved with refraction o the lens is not part of any tunic, because of the variable elastic change (it is elastic) …showed first 75 words of 702 total…

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…showed last 75 words of 702 total…myopia – nearsighted, image converges in front of retina instead of striking the retina, problem is fixed using a concave lens 3. hyperopia – farsightedness, image converges behind retina instead of striking retina, problem is fixed using a convex lens Chapter 17 Endocrine System • [endo glands release hormones (chemical messengers) into the bloodstream  affect on some metabolic activity in body] example is the pancreas (endocrine organ) increase in blood glucose level (stimulus) causes the release of the hormone insulin.

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