Question

the power of the lens in eye spectacles is -0.5 D name the defect of vision Ankit is suffering from

Answer 1

optical diseases

hope this answer will be correct.

Answer 2

There are two eye defects that exist.

We have :

1) Myopia

2) Hypermetropia

Myopia

With this condition the eye lens can only bring to focus objects that are near and not objects further away.

The power of the lens that can be used to correct this defect is normally negative.

That is it is given as -D.

For example we have : -0.5D

Hypermetropia

With this condition the eye lens can only focus objects that are far away and not objects that are near.

The power of the lens is normally positive in this case.

For example : +0.5

From the explanations above Ankit is suffering from Myopia.