Statistics for Structures Of The Eye

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Description and Function	Structure of Eye	% Correct
Controls the size of the above to determine how much light enters the eye	Iris	93%
Gap where light enters the eye	Pupil	87%
Most refraction of light happens here	Cornea	73%
Carries out additional refraction of light to focus light rays on the retina	Lens	67%
Layer containing light sensitive cells (rods and cones)	Retina	67%
The blind spot is due to this structure	Optic nerve	60%
Area of eye that gives very clear colour vision due to high concentration of cones	Fovea	40%
Layer of cells that stops light reflecting back through eye	Choroid	20%
Clear fluid that keeps the front part of eye in the correct shape	Aqueous humour	13%
Protects the above from damage	Conjunctiva	0%