Question

Part of eye which acts as diaphragm of photography is

• A. Pupil
• B. Cornea
• C. Iris
• D. Lens

Answer 1

The correct option is C Iris

A. Pupil is the aperture of eye or an opening in iris through which light enters the eye.

B. Cornea is anterior portion of sclera which absorbs oxygen from air.

C. Iris is pigmented and opaque structure of eye which controls the amount of light entering the eye by changing the size of pupil. It acts as diaphragm of photography because it regulates size of pupil to control light and thus, affects the quality of image formed.

D. Lens is a transparent and crystalline structure present in eye which focusses the light rays to form an image on the retina.

So, the correct answer is 'Iris'.