Human eye

Near point of an healthy human eye

• 25 m

• 2.5 cm

• 2.5 m

• 25 cm

Change in focal length of an eye lens is caused by the action of the

• Pupil

• Retina

• Ciliary muscles

• Iris

The human eye can focus objects at different distances by adjusting the focal length of the eye lens . This is due to

• Presbyopia

• Accommodation

• Near-sightedness

• Far-sightedness

A person with a myopic eye cannot see objects beyond 1.2 metres distinctly . What should be the type of corrective lens used to restore proper vision

• Concave lens

• Convex lens

• Bifocal lens

• Concave mirror

What is the far point of human eye with normal vision

• Infinity

• 25cm

• 2.5 m

• 25 m

Name the corrective lens used for hypermetropia

• Concave lens

• convex lens

• Bifocal lens

• Diverging lens

The following controls the light entering the human eye

• Iris

• Retina

• Pupil

• Cornea

Tags

NGSS.MS-LS1-8

Function of the optic nerve is is

• Transfer the signals to brain

• Image formation

• sensation of vision

• Controls the light entering the human eye

Name the spot where no image is formed on the retina

• Greenspot

• Black spot

• Black hole

• Optic spot

Rod cells of retina corresponds to

• Light sensitivity

• Colour sensitivity

• Size sensitivity

• All of these