lesson 20 part 1 Flashcards
distance in snellen chart
14 inches 20 feet
composed of a series of progressively smaller row of letters
snellen chart
used to test distance vision
snellen chart
drooping of the eyelid
ptosis
turning out of the eyelid
ectropion
enables the examiner to bring the cornea, lens, and retina into focus
direct opthalmoscopy
to see larger areas of the retina, although in unmagnified sate
direct opthalmoscopy
enables the examiner the eye with magnification of 10 to 40 times the real image
slit-lamp examination
most common color vision test, used to establish whether a person’s color vision is within normal range
ishihara test
often used for parents with macular problems
amsler grid
lesions in the globe or the orbit may not be directly visible
utz
detects retinal lesions
color fundus photography
measures IOP by determining the pressure necessary to indent
tonometry
evaluates the field of vision
perimetry testing
vision impaired because a SHORTENED or ELONGATED eyeball prevent light rays from focusing sharply
refractive errors
medical management for refractive errors
laser
eyeglasses or contact lenses
is used to treat myopia and hyperopia with or without astigmatism
laser vision correction photorefractive keratectomy
characterized by optic nerve damage
glaucoma
there is an increased intraocular pressure caused by congestion of aqueous humor in eye
glaucoma
a lens opacity or cloudiness
cataract
leading cause of blindness in the world
cataract
refers the separation of the RPE from the sensory layer
retinal detachment
