1. Ch 11 Special Senses: The Eyes and Ears

2. 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

3. 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

4. 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

5. 2 nd of 12 paired cranial nerves part of the CNS cranial nerves 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

7. 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

8. 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