Question

A person is advised by the doctor were spectacles convex lenses state the defect of vision he is safariing from

Answer 1

Hi!

Convex lenses are used to correct hypermetropia.

Therefore the person is suffering from hypermetropia.

Hope this helps you!!

Answer 2

$\large\boxed{\fcolorbox{blue}{yellow} {Answer}}$

The person using spectacles of convex lenses is suffering from

hypermetropia (farsightedness).

$\large\boxed{\fcolorbox{blue}{yellow} {Explanation }}$

1. A person suffering from hypermetropja can see distant objects clearly as the image of a distant object is formed on the retina, but cannot see nearby objects clearly as the image of a nearby object would be formed behind the retina instead of on the retina.

2. A convex lens converges the rays of light passing through it.

3. When spectacles of convex lenses of appropriate power are used, the rays of light coming from a nearby object are converged to proper extent before they are incident on the eye lens.

Therefore, after the converging action of the eye lens, the image of a nearby object is formed on the retina of the eye and hence the nearby object can be seen clearly.

Hope it helps!

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