a student is unable to see clearly the word written on the blackboard placed at a distance of approximately 3 m from him name the defect of vision the boy suffering from state the possible cause of this defect and explain the method of collecting it
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The defect is myopia
Causes :
1) excessive curvature of eye lens
2)elongation of eye ball
Concave lens of suitable power is used for correction. It brings back image on retina by diverging the rays initially..
Causes :
1) excessive curvature of eye lens
2)elongation of eye ball
Concave lens of suitable power is used for correction. It brings back image on retina by diverging the rays initially..
Answered by
6
Myopia .
It can be caused by high converging power ( short focal length ) , long eye ball
It can be corrected by using a concave lens .
Concave Len is a diverging lens , so it diverge the light rays which enters the eye and make it to fall on the retina.
It can be caused by high converging power ( short focal length ) , long eye ball
It can be corrected by using a concave lens .
Concave Len is a diverging lens , so it diverge the light rays which enters the eye and make it to fall on the retina.
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