The impact of an image on the retina remains for......$sec$.

The near point and far point of a person are $40\,cm$ and $250\,cm$ respectively. Determine the power of the lens he/she should use while reading a book kept at a distance of $25\,cm$ from the eye $..........D$

$A$ person wears glasses of power $-2.5 \, D$. The defect of the eye and the far point of the person without the glasses are respectively

For the myopic eye,the defect is cured by

The substance present in the choroid is:

Myopia is a defect of the eye due to which a person experiences difficulty in seeing .......