Name the condition resulting due to the eye lens becoming cloudy.

Explain how a normal human eye is able to see distinctly objects placed at a distance as well as those placed at a nearer distance. What is the far point and near point of a normal human eye?

Through which part of the eye do light rays from an object first enter the eye?

Due to atmospheric refraction of light,the Sun appears to rise $................$ its actual sunrise.

Give one example in nature where we can see the dispersion of white light.

$A$ person cannot see objects distinctly when placed beyond $2\, m$.
$(a)$ Identify the eye defect.
$(b)$ Give two reasons for this defect.
$(c)$ Calculate the power and nature of the lens he should be using to see the distant objects clearly.
$(d)$ Draw the ray diagrams for the defective and the corrected eye.