Chapter 12: Eye Flashcards
eye
organ of vision
sclera
outer protective layer of the eye; the portion seen on the anterior portion of the eyeball is referred to as the white of the eye
cornea
transparent anterior part of the sclera, which is anterior to the aqueous humor and lies over the iris. it allows the light rays to enter the eye.
uvea
layer of tissue beneath the sclera and cornea; contains the choroid, iris, and ciliary body
choroid
middle layer of the eye, which is interlaced with many blood vessels that supply nutrients to the eye
iris
pigmented muscular structure that regulates the amount of light entering the eye by controlling the size of the pupil
ciliary body
connects the choroid to the iris; produces aqueous humor and helps change the shape of the lens for focusing
pupil
opening in the center of the iris
lens
lies directly behind the pupil; its function is to focus and bend light
retina
innermost layer of the eye, which contains the vision receptors
macula
small portion of the retina at the back of the eye; responsible for detailed central vision
optic nerve
carries visual impulses from the retina to the brain
aqueous humor
watery liquid found in the anterior cavity of the eye. it provides nourishment to surrounding structures and maintains shape in the anterior portion of the eye
vitreous humor
jellylike substance found behind the lens in the posterior cavity of the eye that maintains its shape
meibomian glands
oil glands found in the upper and lower edges of the help lubricate the eye (also called tarsal glands)
lacrimal apparatus
network of glands, ducts, canals, and sacs that produce and drain tears; the lacrimal gland produces tears, which then flow through lacrimal ducts to cover the surface of the eye.
conjunctiva
mucous membrane lining the eyelids and covering the anterior portion of the sclera
blephar/o
eyelid
conjunctiv/o
conjunctiva
cor/o
pupil
corne/o
cornea
dacry/o
tears
ir/o
iris
irid/o
iris
kerat/o
cornea
lacrim/o
tear
ocul/o
eye
ophthalm/o
eye
opt/o
vision
phac/o
lens
phak/o
lens
pupill/o
pupil
retin/o
retina
scler/o
sclera
uve/o
uvea
angi/o
vessels; blood vessels
blast/o
developing cell, germ cell
cry/o
cold
cyst/o
bladder, sace
dipl/o
two, double
is/o
equal
leuk/o
white
myc/o
fungus
nas/o
nose
phot/o
light
pseud/o
false
rhin/o
nose
ton/o
tension, pressure
xer/o
dry, dryness
a-, an-
absence of, without
bin-
two
endo-
within
intra-
within
-al
pertaining to
-algia
pain
-ar
pertaining to
-ary
pertaining to
-eal
pertaining to
-ectomy
excision, surgical removal
-graphy
process of recording, radiographic image
-ia
diseased or abnormal state, condition of
-ic
pertaining to
-itis
inflammation
-logist
one who studies and treats
-logy
study of
-malacia
softening
-meter
instrument used to measure
-metry
measurement
-oma
tumor, swelling
-opia
vision
-osis
abnormal condition
-pathy
disease
-pexy
surgical fixation
-phobia
abnormal fear or aversion
-plasty
surgical repair
-plegia
paralysis
-ptosis
drooping, sagging, prolapse
-scope
instrument used for visual examination
-scopy
visual examination
-stomy
creation of an artificial opening
-tomy
cut into, incision
aphakia
condition of without a lens
blepharitis
inflammation of the eyelid
blepharoptosis
drooping of the eyelid
conjunctivitis
inflammation of the conjunctiva
dacryocystitis
inflammation of the tear sac
diplopia
double vision
endophthalmitis
inflammation within the eye
iridoplegia
paralysis of the iris
iritis
inflammation of the iris
keratitis
inflammation of the cornea
keratomalacia
softening of the cornea
leukocoria
condition of white pupil
oculomycosis
abnormal condition of the eye caused by a fungus
ophthalmopathy
disease of the eye
ophthalmalgia
pain in the eye
ophthalmoplegia
paralysis of the eye (muscle)
phacomalacia
softening of the lens
retinoblastoma
tumor arising from a developing retinal cell
retinopathy
(non inflammatory) disease of the retina
scleritis
inflammation of the sclera
scleromalacia
softening of the sclera
uveitis
inflammation of the uvea
uveoscleritis
inflammation of the uvea and sclera
xerophthalmia
condition of dry eye (conjunctiva and cornea)
amblyopia
reduced vision in one eye caused by disuse or misuse associated with strabismus, unequal refractive errors, or otherwise impaired vision. the brain suppresses images from the impaired eye to avoid double vision
anisometropia
significant unequal error between two eyes
astigmatism
blurred vision caused by irregualr curvature of the cornea or lens. light refracts improperly resulting in diffused rather than points of light focusing on the retina
cataract
clouding of the lens of the eye
chalazion
noninfected obstruction of an oil gland of the eyelid
drusen
yellowish deposits located under the retina; commonly associated with aging and macular degeneration
glaucoma
eye disorder characterized by increase of intraocular pressure. if left untreated may progress to optic nerve damage and visual impairment/ loss
hyperopia
farsightedness
hyphema
hemorrhage within the anterior chamber of the eye; most often caused by blunt trauma
macular degeneration
progressive deterioration of the portion of the retina called macula, resulting in loss of central vision. age related macular degeneration is the leading cause of legal blindness in persons older than 65yrs
myopia
nearsightedness
nyctalopia
poor vision at night or in faint light
nystagmus
involuntary, jerking movements of the eye
pinguecula
yellowish mass on the conjunctiva that may be related to long term exposure to UV light, dry climate, dust. if it spreads to the cornea it becomes pterygium
presbyopia
impaired vision as a result of aging
pterygium
this tissue growing onto the cornea from the conjunctiva usually caused by sun exposure
retinal detachment
separation of retina from the choroid in the posterior portion of the eye resulting in a disruption of vision that may be permanent if treatment is delayed. onset may be gradual or sudden and is not painful
retinitis pigmentosa
hereditary progressive disease marked by night blindness with atrophy and retinal pigment changes
strabismus
condition in which the eyes look in different directions; caused by disfunction of the external eye muscles or uncorrected refractive error
sty
infection of an oil gland of the eyelid
blepharoplasty
surgical repair of the eyelid
cryoretinopexy
surgical fixation of the retina by using extreme cold (CO2)
dacryocystorhinostomy
creation of an artificial opening between the tear sac and the nose
iridectomy
excision of the iris
iridotomy
incision of the iris
keratoplasty
surgical repair of the cornea
sclerotomy
incision into the sclera