the eye and the camera Flashcards
1
Q
convex lenses
A
in our eyes, focus light, enable us to see
2
Q
point where rays cross
A
focus/focal point
3
Q
retina
A
photosensitive layer of cells at back of eye
4
Q
cornea
A
transparent outer part of eye
5
Q
sclera
A
hard structure forming outside of eye
6
Q
iris
A
muscle controling size of pupil
7
Q
optic nerve
A
sends electrical impulses from eye to brain
8
Q
pupil
A
changes size to adjust amount of light
9
Q
lens
A
focuses light entering the eye
10
Q
photoreceptors
A
cells sensitive to light
11
Q
rod photoreceptor
A
sensitive to movement and dim light
12
Q
cone photoreceptor
A
sensitive to colour and bright light
13
Q
chemical reaction between light and photoreceptor
A
produces an electrical impulse which travels up the optic nerve to brain
14
Q
eye takes in
A
images, brain produces it
15
Q
long sightedness
A
can only see long, convex lens corrects it
