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Ear Parts
Path Sound Takes Through the Ear
Path Light Takes Through the Eye
Eye Parts
Ear/Eye Correction
100
The visible ear flap and canal that leads sound waves to the inner ear and protects the inner ear.
The pinna and auditory canal.
100
Thirdly, vibrations reach the _________, three small bones, and pass vibrations along.
The ossicles.
100
Lastly, the ________ carries signals from the ear to the brain where the image is flipped.
optic nerve
100
Define iris and pupil.
The circular structure that surrounds the opening which light enter the eye and regulates the amount of light entering the eye.
100
A surgery in which a laser shaves away corneal tissue under the cornea to better focus light on your retina
LASIK surgery.
200
A delicate hollow structure of the inner ear with coiled tubes filled with fluid and has 25,000 sound receiving cells where vibrations are changed into nerve impulses.
The cochlea.
200
First, sound waves reach the _____ and __________ as sound waves.
pinna, auditory canal
200
First, light passes through the _____, a clear tissue that covers the front of the eye.
cornea
200
Define lens.
A curved piece of glass or other transparent material that is used to refract light.
200
This surgery has two main components- an externally worn microphone, sound processor and transmitter system, and the implanted receiver and electrode system, which contains the electronic circuits that receive signals from the external system and send electrical currents to the inner ear. This is for those with hearing loss due to the cochlea to produce useful hearing sensations.
Cochlear Implants
300
The smallest bones in the body where they form a chain across the middle ear and carry vibrations along.
The ossicles; hammer, anvil, and stirrup
300
Lastly, nerve impulses are sent to the auditory cortex by the _________.
auditory nerve
300
Third, the ___ refracts light to the retina.
lens
300
Define cornea.
A clear tissue that covers the front of the eye.
300
Lenses placed directly on your eyes shaped more as either concave for nearsightedness or convex for farsightedness.
Contact lenses.
400
Receives sound waves from the auditory canal and changes sound waves into vibrations.
The ear drum.
400
Secondly, sound waves are changed into vibrations at the _______.
ear drum
400
Fourth, light is focused on the _____ and creates an upside down image.
retina
400
Define optic nerve.
A short, thick nerve that carries signals from the eye to the brain.
400
Lenses placed in a frame that is placed infront your eyes made as more concave or convex to bend the light so it lands right on your retina.
Eye glasses.
500
Carries nerve impulses to the auditory cortex of the brain where they will be perceived as sound.
The auditory nerve.
500
Fourth, vibrations are changed into nerve impulses at the ______.
cochlea
500
Secondly, light passes through the ____, an opening where light enters the eye, which is controlled by the _____, a circular muscle that surrounds the pupil and regulates the amount of the light entering the eye.
pupil, iris
500
Define the three receptor cells, retina, rods, and cones, at the back of the eye.
Retina: a layer of receptor cells at the back of the eye on which an image is focused Rods: receptor cells that work best in dim light and enable you to see black, white, and gray Cones: receptor cells in the eye that works best in bright light and let you see in color
500
A small microphone that picks up sound from the environment and changed into an electrical signal, then is amplified in volume, then the receiver changes electrical signal back into sound and sends it back into the ear.
Hearing Aids