The eye

Created by

Lily

Cards (53)

where is the eye found
orbit of skull
where are dogs and cats eyes on their skull
forward
what type of vision do dogs mainly have
binocular
where are eyes on rabbit skulls
lateral
what vision to rabbits have lots of
monocular
what are the 3 layers of the eyeball
sclera
uvea
retina
what part of the eye is the sclera
white
what tissue makes up the sclera
dense connective tissue
what is the function of the sclera
provide protection for inner structures
what is the function of the cornea
focus light ray on sclera
what covers the cornea
conjunctiva
what are the 3 parts of the uvea
choroid
cillary body
iris
what does choroid contain
tapetum lucidum
what is the function of tapetum lucidum
increases night vision by reflecting light back to the retina
what is the thickest part of the uvea
cillary body
what is the function of the cillary body
alter shape of biconvex lens
what is the role of suspensory ligaments
provide support around lens
what part of the eye is the iris  
coloured
what is the function of the iris
contains smooth muscle to alter pupil
what happens to the pupil when bright light shines
muscle contraction
pupil becomes smaller
miosis
what happens to the pupil when low levels of light
radial muscle contraction
pupil dilates
mydriasis
what is the name of the response when both pupils respond equally to light
consensual response
what nerve supplies the iris
occulomotor
what are the 3 layers of the retina
photoreceptor cells
bipolar neurones
ganglion cells
what do rods respond to
low light levels
not colour
what do cones respond to
bright light levels
provide colour
what photoreceptor allows animals to see in dark
rods
what is the function of bipolar neurones
gather information from rods and cones to send to next layer
what is the function of ganglion cells
transmit nerve impulse from retina to optic disc forming optic nerve
why is there a blind spot in the eye
no photoreceptors
describe the appearance of the lens
transparent biconcave disc
what alters the shape of the lens
cillary body
what does a flatter lens give
better far vision
where is anterior chamber found
between iris + cornea
what fluid does anterior chamber contain
aqueous humour
where is posterior chamber found
between iris + lens
what fluid does posterior chamber contain
aqueous humour
where is posterior cavity found
between lens + retina
what fluid does posterior cavity contain
vitreous humour
what is the function of aqueous + vitreous humour
maintain shape of eye
provide nutrients