Ch. 17 Vocab Flashcards
the fibrous, outer layer of the eye that forms the white area of the anterior surface; a portion of the fibrous tunic of the eye
sclera
reduction in visual activity due to a curvature irregularity in the cornea or lens
astigmatism
an abnormal condition in which the lens has lost its transparency
cataract
a condition in which a person is unable to distinguish certain colors
color blindness
deafness resulting from conditions in the outer or middle ear that block the transfer of vibrations from the tympanic membrane to the oval window
conductive deafness
delamination of a portion of the neural retina, which separates the photoreceptor layer from the pigment layer
detached retina
deterioration of the retinal photoreceptor layer due to vascular damage and the overgrowth and rupture of blood vessels on the retinal surface
diabetic retinopathy
a condition characterized by increased intraocular pressure due to the impaired reabsorption of aqueous humor
glaucoma
farsightedness: a condition in which nearby objects are blurry, but distant objects are clear
hyperopia
nearsightedness: a condition in which vision at close range is normal, but distant objects appear blurry
myopia
deafness resulting from problems within the cochlea or along the auditory nerve pathway
nerve deafness
loss of visual activity under dim light conditions due to inadequate visual pigment production, usually as a result of vitamin A deficiency
night blindness
abnormal eye movements that may appear after damage to the brain stem or inner ear
nystagmus
infection and tissue inflammation within the middle ear cavity
otitis media
a type of hyperopia that develops with age as lenses become less elastic
presbyopia
eyelids
palpebrae
the transparent portion of the fibrous tunic of the anterior surface of the eye
cornea
the innermost layer of the eye, lining the vitreous chamber
retina
the middle, vascular layer in the wall of the eye
choroid
the opening in the center of the iris through which light enters the eye
pupil
a fluid similar to perilymph or cerebrospinal fluid that fills the anterior chamber of the eye
aqueous humor
the gelatinous mass in the vitreous chamber of the eye
vitreous humor
a broad, flattened process that resembles the external ear; in the ear, the expanding, projecting portion that surrounds the external auditory meatus, aka pinna
auricle
a passageway in the temporal bone that leads to the tympanic membrane of the inner ear
external acoustic meatus
the membrane that separates the external acoustic meatus from the middle ear; the membrane whose vibrations are transferred to the auditory ossicles and ultimately to the oval window ; aka the eardrum
tympanic membrane
small bones
ossicles
the fluid contents of the membranous labyrinth of the inner ear
endolymph
a fluid similar in composition to cerebrospinal fluid; located in the spaces between the bony labyrinth and the membranous labyrinth of the inner ear
perilymph
where the hair cells of the cochlear duct lie
organ of corti
a pleasant taste that is characteristic of beef broth, chicken broth, and Parmesan cheese
umami
a contractile structure, made up of smooth muscle, that forms the colored portion of the eye
iris
