Biology 120Presentation 13Special Senses: The Eye and EarMary Oliva

What's the abbreviation?

1. pressure equalizing tube

2. eye, ear, nose and throat

3. bone conduction

4. both ears

5. otitis media

6. emmetropia

7. exotropia

8. left eye

9. extraocular movement

10. visual activity

Pressure Equalizing Tube abbreviation: PE tubesmall tube surgically placed in a child's eardrum to assist in drainage of trapped fluid and to equalize pressure between the middle ear cavity and the atmosphere

eye, ear, nose and throatabbreviation: EENT

Bone conductionabbreviation: BCthe conduction of sound between the bones and the skullwhy one person's voice sounds different to him/her when it is recorded and played back

Both earsAbbreviation: AUAU = “auris uterque”

Latin for each ear

Otitis mediaAbbreviation: OM

Ot/o: ear -itis: inflammation media: middle

Often seen in children, it is a middle ear infection often preceded by an upper respiratory infection

Pathogens move from the pharynx to the middle ear via the Eustachian tube

Serous otitis media: watery fluidPurulent otitis media: fluid full of pus

EmmetropiaAbbreviation: EM

Emmetr/o: correct, proper-opia: vision condition

State of normal vision

ExotropiaAbbreviation: XT

Exo-: outward-tropia: turned condition

Outward turning of the eye“wall-eyed”

Example of strabismus – muscles weakness of the eye

Left eyeAbbreviation: OS

“oculus sinister”

Extraocular movementAbbreviation: EOM

Extra-: outside ofocul/o: eye-ar: pertaining to

Pertaining to being outside the eyeball

Tested by having patient move look in all directions without moving their head to see if they experience any double vision

Visual acuityAbbreviation: VAMeasurement of the sharpness of a patient’s vision

Snellen chart: used to measure visual acuityImage on left is example