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Pupil Allows light to enter the eyeball through a hole
in the central iris
Arousal, being seated, drugs, Affects the size of the pupil
alcohol, concusision or damage
Iris Muscles that regular the amount of light
entering the eye
, Iris Controls pupil size through circular and radial
fibers
Iris Pigmented parts of the eye that protects from
light damage
Lens Focuses light rays onto the retina
Cornea Helps focus light, transparent cover of the iris
Cornea Most anterior / rostral portion of the eyeball
Choriod Lies in the sclera and provides nutrients to the
retina through blood supply
Retina Start of the visual pathway that
contains photoreceptors Lines
3/4 of the eyeball
Photoreceptors Rods & Cones
Constricted pupil Bright light
Relaxed pupil Normal light
Dialated pupil Dim light
Circular fibers Stimulated in bright light, smaller pupil