what is astigmatism
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Astigmatism, nonuniform curvature of the cornea (the transparent, dome-shaped tissue located in front of the iris and pupil) that causes the eye to focus images at different distances, depending on the orientation of light as it strikes the cornea
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Hi friend_______,
★ In this defect, the eye cannot see parallel and horizontal lines clearly.
★ It may be inherited or acquired.
★ It is due to the imperfect structure of eye lens due to the development of cataract on the lens, ulceration of cornea, injury to the refracting surfaces etc..
★ It is corrected by cylindrical lenses (Torrid lenses).
Thank you..
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