Ear and eye physiology

Eye adjusts focus to see objects at different distances

Accommodation

What is it

astigmatism chart

Blurry or distorted lines suggests

Astigmatism

Lines are equally clear suggests

Normal vision

What is this

Blind spot chart

where is your blind spot?

Optic disk

Ishihara plates test what?

Color blindness

What are these?

Ishihara plates

Automatic response of the pupils to light changes

Pupillary reflex

in bright light pupils ____

Constrict

In low light pupils ____

dilate

What is this?

Snellen chart

Tests visual acuity, how well you can see from a distance

Snellen chart

Ability to hear sounds clearly and accurately

Auditory acuity

Tests that spins patient to diagnose vertigo, dizziness, or balance and evaluate vestibular function

Barany test

Test to help determine hearing loss in middle ear (conductive) or inner ear (sensorineural) by comparing bone and air conduction

Rinne test

Photoreceptors that provide color vision

Cones

Photoreceptors that respond to low light and are primarily responsible for night vision

Rods

Test to determine if there is unilateral hearing loss

Weber test

Neurological test to assess balance, equilibrium, and proprioception (body’s ability to sense position in space)

Romberg test

Assesses the ability to determine the location of a sound

Sound localization

Determines which ear is effected by hearing loss

Rinne test