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

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

Name the spot where no image is formed on the retina

• Greenspot

• Black spot

• Black hole

• Optic spot

The muscular diaphragm that controls the size of the pupil is ---------------

• cornea

• ciliary muscles

• Iris

• retina

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

• retina

• iris

• cornea

• pupil

The image formed on the retina of the human eye is ----------------

• virtual and inverted

• real and inverted

• real and erect

• virtual and erect

The place where all nerves from the retina join to form the optic nerve. Each eye has a _____ _____ where there are no light-sensitive cells

• rods

• blind spot

• cones

• cornea

A tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through the _______ before making its way to the lens.

• aqueous humor

• blind spot

• cones

• cornea