The Eye Flashcards
1
Q
What is the cornea?
A
Focuses light on the retina
2
Q
What is the pupil?
A
‘Hole’ (transparent part) which light enters through
3
Q
What is the iris?
A
Makes pupil larger/smaller depending on amount of light entering the eye. (Dark= large pupil)
4
Q
What is the aqueous humour?
A
Thin, transparent fluid. Provides nutrition and maintains eye
5
Q
What is the retina?
A
Image forms here(focuses). Contains millions of light sensitive cells (cones+ rods).
6
Q
What is the optical nerve?
A
It sends image to the brain electrically.
7
Q
What is a blind spot?
A
Where nerve leaves retina so lacks receptor cells.
8
Q
What is an optical illusion?
A
Coloured, light, patterns. They create a deceptive image.
9
Q
What is the lens?
A
Completes the focusing process. Ciliary muscles around it make it thinner and thicker.
