Eye Anatomy Flashcards
1
Q
Sclera
A
Tough white layer to resist punctures.
2
Q
Cornea
A
Bends image
No blood vessels
90% of focus power
3
Q
Iris
A
Circular muscle
Controls pupil size
4
Q
Pupil
A
Where light enters eye.
5
Q
Ciliary Muscles
A
Controls lens shape for focusing.
6
Q
Choroid
A
Blood rich
Dark inky layer to darken eye
7
Q
Lens
A
Focuses and inverts image
10% of focus power
8
Q
Aqueous Humour
A
Clear fluid between cornea/lens
Fluid renewed every 30 mins
Nourishes cornea
9
Q
Vitreous Humour
A
Clean pressurized fluid to maintain eyeball shape
10
Q
Retina
A
Contains photoreceptors
11
Q
Fovea Centralis
A
90% of cones
Color vison
Central/Clarity/sharpness of vision
12
Q
Blind spot
A
Where optic nerve leaves the eye
No room for photoreceptors
13
Q
Optic Nerve
A
Contains 1 million axons to occipital lobe
