The Eye Flashcards
parts of the eye
sclera, cornea, pupil, lens, iris, ciliary body, chroid, retina, fovea, optic nerve
cornea
reflects light toward the pupil
aqueous humour
supplies cornea with nutrients and refracts light
iris
regualtes the amount of light entering the eye
pupil
the opening in the iris that allows light into the eye
lens
focus the image on the retina
ciliary muscles
open and closed the iris (uses tension)
vitreous humour
maintains the shape of the eyball and permits light transmission to the retnis
- liquid within the eye
retnia
contains photoreceptors
rods
used for veiwing dim light
cones
identify color
fovea centralis
most light sensitive area of the retnia; contains only cones
choroid layer
prevents light scattering
sclera
supports and protects delicate photo cells
- first layer
- connects the the socket and provides structure