The Eye Parts Flashcards
Conjunctiva what
mucous membrane found at edge of iris/under eyelid
Conjunctiva fx
Produces mucous to lubricate the eye
Ciliary Body what
Smooth muscle with Melanin (brown pigment)
Ciliary body fx
absorb some light, controls shape of lens
ciliary body tidbit
melanoctyes can become cancerous
suspensory ligaments what
ligaments from ciliary body to the lens
suspensory ligaments fx
change the shape of the lens to allow you to focus
suspensory ligaments tidbit
as you age, it loses elasticity..can’t adjust which makes you far sighted
Iris what
colored part of the eye, two layers of elastic fibers, contains melanin
iris fx
prevents light from entering eye
iris tidbit
spot on the eye is a birth mark, different color eyes can be due to genes or an injury
Aqueous Humor what
clear and watery fluid in front of the eye
aqueous humor fx
maintain shape, provide nutrients/oxygen, eliminates waste
aqueous humor tidbit
constantly being made
lens what
dense connective tissue shaped like a skittle
lens fx
focuses light onto the retina
lens tidbit
can be off center-marfan syndrome
pupil what
hole in the eye
pupil fx
regulates light that enters the eye
pupil tidbit (Looks)
offcenter: genetic, multiple: genetic, keyhole: genetic/mutation
pupil tidbit (emotions)
Based on emotion, dilate: interested, problem solving, constrict: bored
Cornea what
outer, transparent covering
Cornea fx
keep things in/out
cornea tidbit
Quick healing, can absorb aqueous humor (when you’re burned, injured, or die), you will get an ulcer on it if you leave in contacts too long
Canal of Schlem what
tiny canal in the eye
Canal of schlem fx
drainage of toxins/aqueous humor
cana of schlem tidbit
eye boogers
canal of petit what
tiny canal
canal of petit fx
regulates air pressure
canal of petit tidbit
can shoot milk/air out of canal
vitreous humor what
glass, jelly like fluid
vitreous humor fx
maintains shape, nourishes eye, absorb stray light
vitreous humor tidbit
tiny pieces of vitreous humor that become dislodged
optic disk what
area where optic nerve exits the eye, has no rods/cones
optic disk fx
blind spot
optic disk tidbit
blind spot can be increased/induced with illness/injury
optic nerve what
nerve from eye to brain
optic nerve fx
Conveys impulse from eye to the occipital lobe
optic nerve tidbit
can be stretched
fovea what
area of the retina
fovea fx
where image is focused
fovea centralis what
center of the fovea, highest # of rods/cones (light receptors)
fovea centralis fx
simplest focus
sclera what
outer layer in the eyes, white, dense connective tissue, contains vessels
sclera fx
protection, reflects light
choroid what
middle layer, black pigment/vessels, contains to pupil
choroid fx
controls size of pupil, absorbs stray light, supplies oxygen/nutrients
retina what
inner layer, contains light receptors rods/cones
retina fx
rods-dim light, cones bright light/color
retina tidbit
dogs: less cones, humans: red, blue green cones, if you are missing cones, you are color blind you are missing cones, women can have extra cone.
