Light enters the eye through a thin membrane called the

The shape of eye-ball is nearly _________________

Following controls and regulates the amount of light entering the eye

_________________ send signals to the brain

When the light is very bright, the diameter of pupil

When an object is placed closer to eye ____________

To see an object comfortably and distinctly, we must hold it about _______ cm from our eyes.

The ability of the eye lens to adjust its focal length is called

The farthest point upto which the eye can see objects clearly is ____________ for a normal eye.

Following is far-sightedness

The person who is suffering from the following disease cannot donate eyes.

The person who is suffering from _____________ requires bi-focal lens.

Following is true for Hypermetropia

the black opening between the aqueous humour and the lens is called