Ch 11 Special Senses: The Eyes and Ears

Terms for Eyes Iris- ir/i, ir/o, irid/o, irit/o- controls

the amount of light entering the eye Lens- phac/o- focuses rays of light on

the retina Retina- retin/o- converts light images

into electrical images and transmits them to the brain

Terms for Ears Outer ear- pinn/i- transmits sound

waves to the middle ear Middle ear- myring/o, tympan/o-

transmits sound waves to the inner ear Inner ear- labyrinth/o- receives sound

vibrations and transmits them to the brain

Medical Specialists Audiologist- specializes in the measurement

of hearing function and the rehabilitation of persons with hearing impairments

Ophthalmologist- specializes in diagnosing and treating diseases and disorders of the eye

Optometrist- holds a Doctor of Optometry (OD) degree and specializes in measuring the accuracy of vision to determine whether correction lenses or eye glasses are needed

2nd of 12 paired cranial nerves part of the CNS

enables the eyeball to hold its spherical shape

color and light sensitive and the central point of sharpest vision

Contains rods and cones that convert light into energy signals sent to the brain by the optic nerve

Refracts light

Allows light to enter the retina

A space with fluid

Ch 11 Terms blephar/o eyelid dacryocyst/o lacrimal sac (tear sac) irid/o iris, colored part of eye kerat/o cornea, hard ophthalm/o eye, vision optic/o, opt/o eye, vision ot/o ear, hearing presby/o old age pseud/o false retin/o retina, net

Words Blepharoptosis> drooping of the upper eyelid Dacryocystsis> an inflammation of the lacrimal sac that

is associated with faulty tear drainage Iridectomy> surgical removal of a portion of the iris tissue Keratitis> inflammation of the cornea of the eye Ophthalmologist> a specialist in diagnosing and treating

diseases and disorders of the eye Optmetrist> a specialist in measuring the accuracy of

vision to determine if corrective lenses of eyeglasses are needed

Otomycosis> a fungal infection of the external auditory canal

Presbyopia> changes in the eye that occur with aging Pseudophakia> an eye in which the natural lens is

surgically replaced with intraocular lens Retinopexy> laser treatment to reattach a detached

retina