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40 Cards in this Set

  • Front
  • Back

3 layers of eyes

1. sclera


2. choroid


3. retina

sclera

white fibrous tissue, covers "white" of the eye

choroid

vascular layer. has dark pigmentation to prevent light from reflecting internally and is heavily vascularized to deliver blood to the retina

retina

visual receptive layer

vitreous humor

watery fluid that fills much of the eye, helps maintain curve of cornea

subjective assessment of eye

any visual difficulty (decreased acuity, blurring of vision?)


pain?


strabismus? diplopia?


watering of eyes, discharge or redness?


any history of eye problems?


use of glasses or contact lenses?


floaters?


blind spots?


scotoma

blind spot surrounded by an area of normal or decreased vision, occurs with glaucoma and optic nerve disorders

photophobia

inability to tolerate light

diplopia

perception of two images of single object

strabismus

deviation in the axis of the eye

presbyopia
decrease in the power of accomodation with aging, is suggested when the person moves the card farther away

due to glasslike, hard lens

nystagmus

fine, oscillating movement best seen around the iris. Occurs with disease of the semicircular canals in the ears, a paretic eye muscle, mutiple sclerosis, or brain lesions

hyperthyroidism

lid lag and severe exophthalmos

exophthalmos

protruding eyes

enophthalmos

sunken eyes

pallor of lower lid

may indicate anemia

scleral icterus

even yellowing of the sclera extending up to the cornea, indicating jaundice

eye exam - inspection

general apperance


conjunctiva


lacrimal gland


sclera


ptosis

drooping of upper lid

edema causes

hypothyroidism, renal failure, CHF

sagging causes

myostemia gravis, ocular motor cranial nerve damage

further eye inspection

1. orbital area


2. eyelids


3. conjuctivae and sclera


4. corneal clarity


5. iris


6. pupils


7. pupillary light reflex

conjunctivae

clear and show the normal color of pink over the lower lids and white over the sclera with no change, swelling or lesions

presence of excessive tearing of lacrimal apparatus

may indicate blockage of nasolacrimal duct. press index finger against sac just inside the lower orbital rim

arcus senilis

commonly seen around the cornea. grey white arc or circle around the limbus due to deposition of lipid material. may look thickened or raised but no effect on vision

iris

colored part. acts as a diaphragm

pupils

round, regular, equal, 3-5 mm

pupillary light reflex


direct light reflex


consensual light reflex

darken room, focus on far object, shine light from the side results in


1- constriction of the same sided pupil (direct light reflex) and


2 - simultaneous constriction of other pupil (consensual light reflex)

accomodation

adjustment of eye to various distances


test by having patient look at a further object, then a closer object and look for pupillary constriction and convergence of the axis of the eyes

convergence

eyes move inward as object gets closer

PERRLA

pupils equal, round, react to light and accommodation

distance person stood from chart

visual acuity denominator

cataract formations
1/3 age related vision loss
lens opacity
resulting from clumping of proteins in the lens
glaucoma
2/3 causes of age related vision loss
increased intraocular pressure
gradual loss of peripheral vision is common= chronic open angle glaucoma
macular degeneration
3/3 causes of age related vision loss
breakdown of cells in the macula of the retina
loss of central vision
common cause of blindness
scleral icterus
even yellowing of sclera extending up to the cornea indicating jaundice
anisocoria
pupils of 2 different sizes
ocular fundus
internal surface of the retina
media
anterior chamber, lens, vitreous
red reflex
caused by reflection of ophthalmoscope light off the inner retina