The Eyes Parts and Functions

Question 1

Sclera

Answer 1

maintains shape and protects the inside

Question 2

cornea

Answer 2

lets light into the eye and bends light rays

Question 3

choroid coat

Answer 3

gives nourishment and absorbs scattered light rays

Question 4

iris

Answer 4

adjusts the size of the pupil to control the amount of light entering the eye

Question 5

pupil

Answer 5

lets light into the eye

Question 6

lens

Answer 6

focuses light into the retina and changes shape to focus on far/near objects

Question 7

Ciliary Muscles

Answer 7

changes the curvature of the lens

Question 8

Aqueous humour

Answer 8

maintains the shape of the eye and nourishes the surrounding cells

Question 9

vitreous humour

Answer 9

maintains the shape of the eye

Question 10

Retina

Answer 10

contains photoreceptors which are rods and cons

Question 11

Rods

Answer 11

detect light intensity

Question 12

Cones

Answer 12

detect colour

Question 13

Fovea Centralis

Answer 13

area where does are densely packed

Question 14

Blind Spot

Answer 14

contains no rods or cones

Question 15

Optic Nerve

Answer 15

carries impulses from rods and cones to the brain

Question 16

Conjunctiva

Answer 16

covers the underside of the eye lid and eyeball, seals the eye from infection

Question 17

Pinna

Answer 17

captures sound waves and directs them into the ear

Question 18

Hyperopia

Answer 18

eye too short and lens too flat
cannot focus on nearby objects
need convex lenses

Question 19

Myopia

Answer 19

eye too long, lens too round
can’t focus on on far objects
need a concave lens

Question 20

Astigmatism

Answer 20

uneven curvature of cornea
light can’t be bent to meet correct focal point
need uneven lenses