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Q.

Astigmation is a defect that affects a person. Its primary cause is:

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a

The distance between the eye lens and the retina is increased.

b

The distance between the eye lens and the retina is reduced.

c

The cornea is not round.

d

The eye's accommodation power is reduced.

answer is C.

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Detailed Solution

Concept: A person with this impairment cannot focus on both the horizontal and vertical lines of a wire gauge at the same time.

Because the cornea is not entirely spherical and has varied curvatures for horizontally and vertically lying objects, this defect occurs.

Cylindrical lenses can be used to fix this flaw. As stated above, Astigmatism occurs because the cornea is not completely spherical and has various curvatures for horizontally and vertically positioned objects. As a result, option 3 is right.
 

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