The retina of the eye acts like the ........ of a camera.

The near point and far point of a normal human eye are respectively:

The far point of a myopic eye is $250 \, cm$. What is the focal length of the lens required to correct this defect?

The far point of a myopic eye is at $40 \, cm$. To correct this defect,the power of the lens required will be: (in $, D$)

The near point and far point of a normal human eye are respectively:

$A$ presbyopic patient has a near point of $30 \ cm$ and a far point of $40 \ cm$. The dioptric power of the corrective lens required for seeing distant objects is: (in $D$)