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The eye

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alisha's version from 2015-05-06 11:29

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FBGACED

 

LabelAnswer
AAllows light to pass through as it enters the eye.
BControls how much light enters the pupil.
CRefracts light as it enters the eye (by a fixed amount). convex
DRefracts light to focus it onto the retina. The amount of refraction can be adjusted by altering the thickness and curvature of the lens.
EAdjust the shape of the lens to make it more or less curved, so as to increase or decrease the refraction of light.
FSlacken or stretch as the ciliary muscles contract or relax, to adjust the thickness and curvature of the lens.
GContains the light receptors, which trigger electrical impulses to be sent to the brain when light is detected.
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