Topic 2 - Structure of the eye Flashcards
1
Q
what is the function of the cornea
A
refracts light rays as they enter the eye
2
Q
what is the function of the iris
A
controls how much light enters the eye
3
Q
what’s the function of the lens
A
further refracts light to focus it on retina
4
Q
what’s the function of the retina
A
contains light receptors
5
Q
what are cataracts
A
occur due to the clouding of the lens
6
Q
what is long sightedness
A
when close objects appear blurry
7
Q
what is short sightedness
A
when distant objects appear blurry
8
Q
what is colour blindness
A
most common red/green colour blindness is where green cone cells don’t function correctly so distinction between these colours becomes poor
