Chabner Chapter 17

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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


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