Question

(a) A student is unable to see clearly the words written on the black board placed at a distance approximately 3 m from him. Name the defect of the vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it.
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Answer 1

Answer:

Short Sightedness or Myopia..

Causes are lens is too curved or eyeball is shortened

it can be corrected by concave lens