Ch. 14 Eyes Flashcards
external eye
- eyelids
- palpebral fissure
- limbus
- canthus
- conjunctiva
- lacriman apparatus
- tarsak plates
- meibomian glands
extraocula muscles
- superior rectus
- inferior rectus
- lateral rectus
- medial rectus
- superior oblique
- inferior oblique
internal anatomy
-outer later= sclrea
-middle layer=choroid
+ciliary body and iris, pupil, lens, anterior chamber
-inner layer=retina
+optic disc, retinal vessels and macula
visual pathways and visual fields
- refractino of light rays
- crossing of fibers at optic nerve
visual reflexes
- pupillary light reflex
- fixation
- accomodation
dev.care
- macular is not matures until 8 months
- 8 years of age, eyes are fully developed
+ visual acuity decreases
+cataract: lens becomes solid (opaque)
presbyopia
the keenest vision begins to fade
visual acuity
decreases with age
CN 2
Cataract
- common in again adult
- lens becomes solid (opaque)
Glaucoma
- common in aging adult
- increase in interocular pressure
- dark and fuzzy around the edges
- african americans are more likely
macular degeneration
break down of cells in macular
- central vision is lost
- caucasion over the age of 40
hyperopia
farsighted
myopia
nearsighted
exotropia (strabismus)
outward turning of eye
esotropia (strabismus)
inward turning of eye
diplopia
seeing double
PERRLA
Pupils. Equal. Round. Reactant to Light. Accomodation
exopthalmos
protruding eye
