Chabner Chapter 17
Pupil
Central opening of the eye
The combining form for cornea is
Kerat/o
Rod
Photoreceptor cell essential for vision in dim light and for peripheral vision
Cone
Photoreceptor cell in the retina; responsible for color and central vision
Optic Chiasm
Point at which optiv nerve fibers cross in the brain
Fovea Centralis
Tiny pit or depression in the retina that is the region of clearest vision
Glaucoma is primarily diagnosed by:
Tonometry
Sclera
Tough, white outer coat of the eyeball
Myring/o means:
Tympanic membrane
Choroid
middle, vascular layer of the eye, between the retina and the sclera
Adjustment of the lens by the ciliary body:
Accommodation
Refraction
Bending of light rays by the cornea, lens, and fluids of the eye to bring them into focus on the retina
Small hard mass on the eyelid; formed from sebaceous gland enlargement:
Chalazion
Snail-shaped, spirally wound tube in the inner ear is the:
Cochlea
Iris
Colored, prigmented layer that opens and closes to allow more or less light into the eye
Photosensitive receptor cells of the retina; make the perception of color possible:
Cones
An eye inflammation commonly called "pinkeye" is:
Conjunctiva
Fibrous layer of clear tissue that extends over the anterior portion of the eye and is continuous with the white of the eye:
Cornea
Optic Nerve
Cranial nerve carrying impulses from the retina to the brain (cerebral cortex)
The combining form for the ciliary body is:
Cycl/o
Astigmatism:
Defective curvature of the cornea or lens
Conjunctiva
Delicate membrane under the surface of the eyelids and covering the anterior eyeball
Channel between the middle ear and the nasopharynx:
Eustachian tube
The meaning of palpebr/o is:
Eyelid
Cornea
Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball
Aqueous Humor
Fluid produced by the ciliary body and found in the anterior chamber of the eye
Biconvex
Having two sides that are rounded, elevated, and curved evenly; characteristic of the lens of the eye
What eye structure is transparent, biconvex, and focuses light on the retina?
Lens
Retina
Light-senstive nerve cell layer containing photoreceptor cells (rods and cons)
Macular degeneration produces:
Loss of central vision
Yellowish region in the retina; contains the fovea centralis:
Macula Lutea
Lens
Transparent, biconvex body behind the pupil; it bends light rays to focus them on the retina
Macula
Yellowish region on the retina, slightly below the optic disc; contains the fovea centralis
Anterior chamber
area behind the cornea and in front of the lens and iris
Myopia:
Nearsightedness
Accommodation
Normal adjustment of the eye to focus on objects from far to near
Place where optic nerve fibers cross in the brain:
Optic Chiasma
Fungal Infection of the ear:
Otomycosis
Visual examination of the ear:
Otoscopy
Fundus of the Eye
Posterior, inner portion of the eye
Nerve deafness occurring with aging:
Presbycusis
Impairment of vision due to old age:
Presbyopia
Optic Disc
Region at the back of the eye where the optic nerve meets the retina
Thalamus
Relay center of the brian; optic nerve fibers pass through the thalamus on their way to the cerebral cortex
Tinnitus:
Ringing sound in ears
A blind spot; area of depressed vision surrounded by an area of normal vision:
Scotoma
Vitreous Humor
Soft jelly-like material behind the lens; maintains the shape of the eyeball
Ciliary Body
Structure surrounding the lens that connects the choroid and iris; it alters that shape of the lens
Bacterial infection of the middle ear:
Suppurative Otitis Media
