1. THE EYE AND EAR SPECIAL SENSES

2. EMMETROPIA State of normal vision No refractive error present

3. LEFT EYE Ocular sinister (OS) Origin-- inoculus (eye) sinister (left)

4. EXTRAOCULAR MOVEMENT Eye movements controlled by muscles innervated by cranial nerves Common symptom of damage is double vision Cranial nerves used are III, IV, and VI

5. VISUAL ACUITY A test in which the patient identify letters Distance tested at 20 feet Measurement of the sharpness of a patients vision

6. EXOTROPIA Outward turning of the eye Known as wall-eyed

7. THE EAR Contains the sensory receptors for hearing and balance Study of ear known as otology Study of hearing disorders is audiology

8. BONE CONDUCTION Conduction of sound to the inner ear through the bones of the skull Two types of bone conduction: Compressional bone conduction Inertial bone conduction

9. COMPRESSIONAL BONE CONDUCTION High pitched sounds Cause segments of the skull to vibrate individually

10. INERTIAL BONE CONDUCTION Low pitched sounds Causes the entire skull to move while the suspended sensory parts of the inner ear remain at rest

11. BOTH EARS Known as binaural Referring to both ears

12. PRESSURE EQUALIZING TUBE Small tube surgically placed in childs eardrum Assist in drainage of trapped fluid Equalize pressure between middle ear cavity and atmosphere

13. EYE, EAR, NOSE AND THROAT Eye contains sensory receptor cells for vision Ear contains sensory receptors for hearing and balance