State the difference between:
(a) myopia and hypermetropia
(b) tactual aids and auditory aids
Answers
Answered by
22
- In Myopia, the person can see nearby objects, but cannot see far objects clearly. In Hypermetropia, the person can see far objects clearly, but cannot see near objects clearly. In people with myopia, the image is formed in front of retina in the eye. ... Hypermetropia is corrected using the Double-Convex lens.
- difference between tactual aids and auditory aids. Tactual aids are non-optical sensory aids which involve the use of touch, e.g. Braille system for blind people. Auditory aids are non-optical sensory aids which involve the sense of hearing, e.g. Tape recorders, cassettes for deaf.
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Answered by
3
Myopia is nothing but shortsightedness. Person can see a nearby object clearly and cannot see a distant object perfectly.This is caused when the light rays from a far away object falls at a distance just before the retina. this problem can be avoided by using concave lens.Hypermetropia is nothing but long sightedness. Person can see a far object clearly and cannot see a nearby object perfectly. this is caused when the light rays from a far away object falls at after the retina.This problem can be avoided by using convex lens.
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