EXP 21, 26, 27, 28 (LAB)

• The measurement of the ability of the lens to focus the light reflected from the object on the fovea centralis of the retina.

  Visual Acuity Test
• Light rays from an object are nearly parallel from what distance?

  20ft
• Harmonious vision is called?

  Emmetropia
• Another word for farsightedness

  Hyperopia
• A condition where a person can see things that are far but near vision is blurred

  Hyperopia
• Another word for near-sightedness

  Myopia
• A condition where one can see objects that are near but far objects are blurred

  Myopia
• A condition that decreases the ability of the lens to accommodate leading to difficulty in focusing on close objects (Usually happens when a person gets old)

  Presbyopia
• The closest distance one can focus on an object

  Near-point of vision
• Near-point visions

  • Young Adult: 10cm
  • Person in their 40s: 20cm
  • Person in their 60s: 80cm
• This condition is caused by abnormal lens or corneal curvature, and this causes part of the image to appear blurred

  Astigmatism
• Decreased ability to conduct sound waves through the external and middle ear to hearing receptors in the internal ear

  Conduction Deafness
• This can be caused by cerumen, damage to the eardrum, or fusion to the ear ossicles

  Conduction Deafness
• Damage of the auditory receptors, cochlear nerve, or the neural auditory cortex pathway.

  Sensorineural Deafness
• Olfactory and Gustatory are both what kind of senses?

  Chemical Senses
• Distance to read Snellen chart

  20ft
• Snellen Eye Chart

  Distance that you are standing: Numerator

  Row/Line of the letter that you can read: Denominator
• Using a Distance Visual Acquity Test using a Snellen Eye Chart

  A 20/20 indicates what?

  Normal Vision
• Using a Distance Visual Acquity Test using a Snellen Eye Chart

  A 20/15 indicates what?

  Better Than Normal Vision
• In a Blind Spot Test, how many inches from the eye should you position the test

  18 inches
• What does the blind spot lack?

  Photoreceptors
• 2 Types of After Image

  1. Positive After Image
  2. Negative After Image
• This type of After Image appears as the same color as the stimulus

  Positive After Image
• This type of After Image appears as the color complementary to the original stimulus

  Negative After Image
• In an Astigmatism Test, if the lines are equally dark and there is no distortion, it means that

  No Astigmatism Present
• In an Astigmatism Test, if the lines are not dark and there is distortion, it means that there is

  Degree of Astigmatism
• In a test for Unilateral Deafness

  What kind of method is applied?

  Weber's Test
• In a test for Unilateral Deafness

  If the sound is equally loud in both ears it can mean that there is

  1. Normal Hearing
  2. Bilateral Deafness
• In a test for Unilateral Deafness

  The tuning fork should be placed on a student's _

  Forehead
• In a test for Unilateral Deafness

  If a sound is louder in one ear it means that there is

  Unilateral Deafness
• A tuning fork vibrates at how many vibrations per second?

  100
• In the Balance Test for Static Equilibrium

  if the equilibrium receptors function normally, what would be the result?

  Posture will always be corrected
• In the Balance Test for Static Equilibrium

  if the equilibrium receptors function abnormally, what would be the result?

  Student will fall
• In a Test for Dynamic Equilibrium

  These Results mean what?

  1. Lateral Movement of Eye: Stimulation of the DER in the lateral semicircular canals
  2. Vertical Movement of Eye: Stimulation of the DER in the anterior semicircular canals
  3. Rotational Movement of Eye: Stimulation of the DER in the Posterior semicircular canals
• What is recorded in a hearing Acuity test?

  Distance in Inches of Inaudible Ticking
• In the Projection of Sound Test

  What is recorded?

  Highest Success of Position of sound
• In a Test for Olfactory, there are 3 outstanding characteristics

  1. High Sensitivity
  2. High Adaptation
  3. Masking Effect of Odors
• In a Test for Olfactory, you must record the time required for the odor to disappear, what is this called

  Adaptation
• Test for Gustation

  What solution is used for the tip of the tongue (sweet) ?

  10% Sucrose Solution
• Test for Gustation

  What solution is used for the tip of the tongue (salty) ?

  20% NaCl Solution