Question

explain myopia and hypermetropia. Show how these defects can be corrected​

Answer 1

Answer:

Myopia: (nearsightedness) This is a defect of vision in which far objects appear blurred but near objects are seen clearly. The image is focused in front of the retina rather than on it usually because the eyeball is too long or the refractive power of the eye’s lens too strong. Myopia can be corrected by wearing glasses/contacts with concave lenses these help to focus the image on the retina.

Hyperopia: (farsightedness) This is a defect of vision in which there is difficulty with near vision but far objects can be seen easily. The image is focused behind the retina rather than upon it. This occurs when the eyeball is too short or the refractive power of the lens is too weak. Hyperopia can be corrected by wearing glasses/contacts that contain convex lenses.

Explanation:

Answer 2

Myopia or short-sightedness is a defect of the eye in which the vision of near objects is clear while vision of distant objects is unclear. In this type of defect,the image from distant objects will be formed just in front of the retina whereas the image of the near objects will be form exactly on the retina. This defect in the vision can be corrected by using concave lens of appropriate power.

Hypermetropia or far-sightedness is a defect of the eye in which the vision of distant objects is clear while vision of the objects is unclear.In this type of defect, the image of near objects will be formed beyond the retina whereas the image of the distant objects will be formed exactly on the retina.This defect in the vision can be corrected by using convex lens of appropriate power.

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