Vision

Question 1

Cornea

Answer 1

Clear

Bends light coming into the eye

Makes up the anterior 1/6 of fibrous tunic

One of the refractory media of the eyeball

Question 2

Sclera

Answer 2

The white part of the eyeball

Tough and white

Makes up the posterior 5/6 of the fibrous tunic

Question 3

Choroid

Answer 3

Brown in color to prevent light scattering in the eye

Makes up the posterior part of the vascular tunic

Question 4

Ciliary body

Answer 4

ciliary muscle :which controls the shape of the lens

Ciliary body: located at the anterior aspect of the eye

Question 5

Iris

Answer 5

Allows light to enter the eye

Consists of muscle fibers that when contract either constricts or dilates

Constriction and dilation control the amount of light that enters the eye

Question 6

Pupil

Answer 6

An opening in the center of the iris in which light enters the eye through

Question 7

Retina

Answer 7

The rear surface of the eye

Lined with visual receptors

Light from the left side of the world strikes the right half of the retina and vice versa

Question 8

Optic nerve

Answer 8

Formed by the ganglion cell axons joining

Where the blood vessels enter and leave

Question 9

Why do some optical illusions work ?

Answer 9

Some optical illusions work because of the way our eyes and brain process images

Others are based on the way we interpret two-dimensional images

Question 10

Fovea

Answer 10

Made of cones

Notices motions and dim light

Question 11

Lens

Answer 11

Magnifying glass