The size of the pupil of the eye is adjusted by:

The human eye forms the image of an object at its:

The change in converging power of an eye-lens is caused by the action of:

The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called :

A person cannot see the distant objects clearly (though he can see the nearby objects clearly). He is suffering from the defect of vision called: