write the importance of ciliary muscles in the human eye . name tjw defect of vision that arises duet o gradual weakning of the
ciliary muscles inold age. What type of
lenses are required by the persons a
suffering from this defect, to sec the objects
clearly?
Answers
Answered by
1
Answer:
hey ciliary muscles helps the eye lens to change its focal length.
- two defects are
- presbyopia
- astigmatism
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Answered by
1
Answer:
Presbyopia is caused by graduall weakning of ciliary muscle
Explanation:they find it difficult to see near by objects comfortably and distinctly without corrective glasses, such people needs to use a bi focal lenses consists of both concave and convex lens
The upper portion consists of a concave lens for distant vision and the lower part is a convex lens for near vision
IMPORTANCE :of ciliary muscle is used to focus near by objects and to view distant objects
The focal length increases when the muscles are relaxed and contract's when looking near objects
HOPE IT HELPS:
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