The eye Flashcards
Limbus
border between cornea and sclera lower lid margin
Meibomian gland
lubricates the eyelid
conjunctiva
protective membrane that covers the exposed part of the eye
palpebral conjuctiva
lines the eyelid
bublar conjunctiva
overlays the eyeball with the white sclera showing through
lacrimal apparatus
contant irrigation
EOMS are intervated by CN
3,4,5
CN III (oculomotor)
Superior, inferior, medial rectus oblique muscles, and medial and inferior oblique muscles
CN IV (trochlear)
Supervisor and oblique muscles
CN VI (abducens)
Lateral rectus muscle (abducts eye)
anterior chamber
contains the aqueous humor (pressure and refactory medium)
Optic Disc
Retinal fibers converge to form the head of the optic nerve
physiologic cup
yellow central depression (1/2 of disc)
Fundus
internal surface of retina central background
macula
temporal side, receives and transduces light, avacuscular and is the area of central vision
floaters
common with myopia, presopia, and aging
retinal detachment
sudden floaters, shade or cobwebs
halos
acute narrow angle glaucoma
scotomas
blind spots in visual fields, retinal tears
night blindness
optic atrophy, glaucoma, vitamin A deficiency
photophobia
intolerance to light
strabismus
deviation of the axis of the eye, all the time or due to fatigue, muscular or neuro