Vision keywords

Question 1

iris

Answer 1

ring-shaped coloured part of your eye surrounding the pupil

Question 2

Pupil

Answer 2

opening in the iris

Question 3

cornea

Answer 3

a transparent layer in the front of your eye that covers the iris and pupil

Question 4

lens

Answer 4

part of the eye behind the pupil that helps to focus light rays into a clear, sharp image

Question 5

retina

Answer 5

a thin layer of light-sensitive cells in the back of your eye

Question 6

cones

Answer 6

light-sensitive cells in the retina that allow you to see colour in bright light

Question 7

rods

Answer 7

light-sensitive cells in the retina that allow you to see grey or black-and-white images in dim light

Question 8

fovea

Answer 8

the most sensitive part of the retina, right across the lens, which contains many cones

Question 9

optic nerve

Answer 9

the nerve of the eye that transmits nerve impulses to the brain

Question 10

blind spot

Answer 10

the spot where the optic nerve enters the eye; it does not contain light-sensitive cells

Question 11

sclera

Answer 11

the white, outer covering of the eye

Question 12

vitreous body

Answer 12

jelly-like fluid inside the eye which helps give the eye its shape

Question 13

ciliary muscles

Answer 13

muscles that control the shape of the lens

Question 14

short-sighted

Answer 14

objects close by are seen more clearly than objects far away

Question 15

long-sighted

Answer 15

distant objects are clearer than objects close by