H1-Exerc... List No. Le.. 1 Normal 1 Ne Questions: A) What is refraction? Which

Question

H1-Exerc... List No. Le.. 1 Normal 1 Ne Questions: A) What is refraction? Which portions of the eye primarily refract light before the light reaches the retina? How did these areas appear in the cow eye? B) What is the function of the optic disc? a at is the function of the choreid? How is the choroid different in cows than it sin humans? What does the choroid look like on the cow eye? Cataracts are often surgically repaired by replacing the natural lens with an artificial one made of plastic. Use your knowledge of the anatomy of the eye to explain why this procedure is effective. D) re to search PrtScn

Explanation / Answer

A) Refraction is the bending of light as it passes from one medium to another that is from air to aqueous fluid of eyes.

Portions of eye which primarily refract light before it reaches the retina are the cornea and the lens.

These areas in the cows eye are black.

B) function of optic disc:

C) function of choroid;

Difference in humans and cows;

In the cows eye choroid is brown .

D) cataract is a condition which causes cloudy appearance of the lens which results in blurring of vision.

Cataract surgery can be effective as the cloudy lens of the eye is removed and is replaced by a clear intra ocular lens ,positioning it securely behind the iris and pupil in the same location as the natural lens ,thereby correcting the vision.

Hope the answer is clear to you.Thank you..

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