Name the defect of vision the boy is suffering from when a student is unable to see clearly the words written on the black board placed at a distance approximately 3m from him. name the defect of vision . state the possible causes of this defect and explain the method of correcting it.
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short sightedness or myopia
causes,
-elongation of eyeball
-excess curvature of eye lens
corrected by using concave lens of apprpriate focal length.
causes,
-elongation of eyeball
-excess curvature of eye lens
corrected by using concave lens of apprpriate focal length.
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THE DEFECT OF VISION HE IS SUFFERING FROM MYOPIA.
THE CAUSE FOR THIS IS:
1 HIGH CONVERGING POWER OF EYE LENS.
2 EYEBALLS BEING LONG.
IT CAN BE CORRECTED BY USING CONCAVE LENS OF APPROPRIATE POWER.
THE CAUSE FOR THIS IS:
1 HIGH CONVERGING POWER OF EYE LENS.
2 EYEBALLS BEING LONG.
IT CAN BE CORRECTED BY USING CONCAVE LENS OF APPROPRIATE POWER.
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