Name the major defects of human eye.how these defects overcome
Answers
Answer:
most common types of eye defects
MYOPIA or NEARSHIGHTED. Myopia occurs when the eyeball is too long, relative to the focusing power of the cornea and lens of the eye. ...
HYPEROPIA or FARESIGHTED. This vision problem occurs when light rays entering the eye focus behind the retina, rather than directly on it. ...
ASTIGMATISM. ...
PRESBYOPIA.
Answer:
There are few common defects of the human eye:
i) Myopia: It is also called Short-sightedness. In this case, a one cannot see distant object clearly. Such a defect is called myopia. The eye lens become thicker.
correction of Myopia: By using spectacles with concave lens of appropriate focal length.
ii) Hypermetropia : It is also called Long-sightedness . In this case, one cannot see a nearby objects clearly. The eye lens become thinner. This defect is called hypermetropia.
correction of Hypermetropia: By using spectacles with convex lens of appropriate focal length.
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