The Eye

Question 1

Iris*

Answer 1

Widens and narrows to control how much light enters the eye
*Part of the middle layer of the eye (uvea)

Question 2

Ciliary body*

Answer 2

Controls the shape of the lens and delivers oxygen/nutrients to the eye
*Part of the middle layer of the eye (uvea)

Question 3

Sclera

Answer 3

Tough connective tissue layer that protects the eye, the front forms the transparent cornea

Question 4

Choroid*

Answer 4

Dark pigmentation lining that contains the blood vessels supplying all of the eye
*Part of the middle layer of the eye (uvea)

Question 5

Retina

Answer 5

Contain photoreceptor cells, the light entering the eye is focused onto the retina by the lens and transmitted to the optic nerve

Question 6

Fovea centralis

Answer 6

Most sensitive area of the retina, responsible for the sharpest and most detailed vision
(Cones only)

Question 7

Blind spot/optic disk

Answer 7

The head of the optic nerve
(No rods or cones present)

Question 8

Optic nerve

Answer 8

Back of the eye, transmits impulses to the brain from the retina

Question 9

Suspensory ligament*

Answer 9

Supports the lens
*Part of the middle layer of the eye (uvea)

Question 10

Cornea

Answer 10

Where light enters the eye

Question 11

Pupil

Answer 11

The hole in the iris that allows light to enter the eye

Question 12

Tapetum lucidum*

Answer 12

Iridescent cells that make the most of low light levels by reflecting light back to the photoreceptor cells (night vision)
*Part of the middle layer of the eye (uvea)

Question 13

Uvea*

Answer 13

*The middle layer of the eye