eyes

Question 1

opens and closes the entire eye and protects the eyeball

Answer 1

eyelid

Question 2

regulates the amount of light entering the eye by controlling the size of the pupil

Answer 2

iris

Question 3

an opening on the iris that opens and closes in response to changes in light intensity

Answer 3

pupil

Question 4

nourishes the cornea and lens

Answer 4

aqueous humor

Question 5

refracts most of the light rays that enter the eye

Answer 5

cornea

Question 6

refracts the light rays further and focuses them on the retina

Answer 6

lens

Question 7

changes the shape of the lens to help it focus at different distances

Answer 7

ciliary muscles

Question 8

serves as the screen where inverted, real and diminished images are formed

Answer 8

retina

Question 9

gives a sharp and central vision

Answer 9

macula

Question 10

nourishes the inside of the eye and helps the eye hold its shape

Answer 10

vitreous humor

Question 11

transmits visual information from the retina to the brain

Answer 11

optic nerve

Question 12

a _ is an optical instrument that resembles the human eye in several aspects

Answer 12

camera

Question 13

the _ of a camera regulates the amount of light that enters the camera, just as the iris regulates the amount of light that enters the eye thru the pupil

Answer 13

diaphragm

Question 14

concave

Answer 14

curved inward

Question 15

convex

Answer 15

curved outward

Question 16

what are the two laws of reflected rays?

Answer 16

the incident ray, reflected ray and the normal to the reflecting surface all lie on the same plane
the angle of incidence = angle of reflection