Question

What are Defects of vision?

Answer 1

Defects of the eye: 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.

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Answer 2

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yoυr qυeѕтιon :

What are defects of vision

anѕwer:

MYOPIA:

Myopia occurs when the eyeball is too long, relative to the focusing power of the cornea and lens of the eye. ... This is also called as nearsightedness

HYPEROPIA:

This vision problem occurs when light rays entering the eye focus behind the retina, rather than directly on it. ... This is also called as farsightedness....

ASTIGMATISM. ...

This defect is when the light rays do not all come to a single focal point on the retina, instead some focus on the retina and some focus in front of or behind it. This is usually caused by a non-uniform curvature of the cornea

PRESBYOPIA.

long-sightedness caused by loss of elasticity of the lens of the eye, occurring typically in middle and old age....

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