Eye Flashcards
associated structures
eyebrows
prevents sweat from dripping into the eye
associated structures
palpebrae ( eyelids)
moisten and protect
associated structures
levator palpebrae superioris
elevates upper eyelid
associated structures
eyelashes
prevent large particles from contacting the surface of the eye
associated structures
conjunctiva
startifed columar with goblet cells; secrets mucus
associated structures
palpebral
on the back of the eye lid
associated structures
bulbar occular
on the surface of the eye
associated structures
lacrimal apparatus (gland)
makes tears, tears contain mucus and antibodies called lysozymes
associated structures
puncta
corner of the eye
associated structures
what is the flow of tears
1) enter 2 small openings the lacrimal and puncta
2) tears then go into lacrimal canals canaliculi
3) then into lacrimal sac inbetween corner and nose
4) finally into nasolacrimal duct
extrinsic eye muscle
superior rectus
moves superiorly, medially,
extrinsic eye muscle
lateral rectus
lateral movements
extrinsic eye muscle
medial rectus
medial movements
extrinsic eye muscle
inferior rectus
moves eye inferiorly
extrinsic eye muscle
superior oblique
moves eye inferiorly and laterally
extrinsic eye muscle
inferior oblique
moves eye superiorly and laterally
Structure: Tunics
fibrous tunic
outermost layer, avascular
Structure: Tunics
sclera
5/6 of the eye nontransparent, the white of the eye
Structure: Tunics
cornea
anterior 1/6 transparent
Structure: Tunics
Vascular tunics
uvea, middle layer, vascular
Structure: Tunics
choroid
posterior 2/3 of they eye, vascular, and pigmeted
nourshies retina and scleara by diffision
Structure: Tunics
ciliary muscle
intrinsic muscler which is attached to the lens by suspensory ligaments
Structure
lens
not apart of the uvea biconvex, transparent, flexible structure that can chnage shape for the focusing of light on retina
Structure
cillary process
contains capillaries that secret aqueous humor
Structure
iris
anterior portion “colored donut”
Structure
sphinceter pupillae
constricts pupil
Structure
dilator pupillae
dialates pupil
Structure
retina
the brain to perceive a visual picture
Structure
pigmented layer
outer layer that has no photoreceptors
Structure
neural layer
inner layer composed of phtorecpetors and associated neurons
Structure
rods
black and white vision and reaponds to low intensity light (night)
Structure
cones
for color vision and responds to high intensity light (daylight)
Structure
what is lateral to the blind spot?
macula lutea with a minute pit in its center called fovea centrialis
structure
what does the fovea contain?
only cones
Structure: Internal spaces
posterior cavity
from lens to retina contains vitreous humor
Structure: Internal spaces
anterior cavity
from lens to cornea; filled with aqeous humor
Structure: Internal spaces
posterior chmaber
from lens to iris
Structure: Internal spaces
anterior chamber
from iris to cornea
Structure: Internal spaces
What is the posterior and anterior chmaber seperated by?
the iris
What makes up the fibrous Tunic
Sclera and cornea
What makes up the vascular tunic
Uvea, choroid, ciliary body, iris
What makes up the retina?
Pigmented layer, neural layer, rods, and cones
