Parts of the Eye
Before looking at how vision
works, lets look the main parts of the eye and
their functions.
Cornea- spherical
surface at the front of the eye which refracts light as
it enters the eye.
Aqueous humor- jelly-like
fluid in front of the lens
Vitreous humor- jelly-like
fluid behind the lens
Pupil- a small hole behind the
cornea that regulates the amount of light entering
eye.
Iris- a colored ring around
the pupil that controls the pupil's size.
Lens- the crystalline lens
behind the the pupil that refracts light to focus an image.
Ciliary muscles- eye muscles
that control the shape of the lens.
Retina-
tissue at the back of the eye that detects light
Optic nerve- transmits the
image from the retina to the brain.
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