CH 8 Basic Pre-testing Procedures

• How should a chief symptom be recorded?


  In the patient's own words
• What type of case history is the easiest to delegate?

  Checklist
• Why should the paraoptometric question the patient about family history?

  Heredity may play a factor in many diseases
• T/F when recording patient history, only the positive responses are pertinent?

  False
• What does the first number/numerator in snellen notation respresent?

  The testing distance
• How many meters are in 1 foot?

  0.305 meters
• What is the properly caliberated height of the 20/200 letter on the snellen chart for a testing distance of 20ft?

  87mm
• NVA should be measured at a distance of?

  40cm
• When may the mirror system be used?

  When the exam room is shorter than 20ft to create a 20ft optical distance
• Why is it more effective to test color vision monocularly?

  Color vision defects are often monocular
• What is the most common type of color vision testing?

  Psuedoisochromatic plates
• Define deuteranomalous 


  Green weakness
• Define tritanomalous


  blue-yellow weakness
• Define protanomalous


  red weakness
• What is the most common color defect

  Deuteranomalous
• What are the 3 near point actions of the eye?

  accommodation, convergence, pupil constriction
• When is the break point (NPC) found?

  When the pt reports diplopia, or one eye loses fixation on the target
• What test determines the presence of tropia?

  Cover-uncover test
• How close is near PD usually do the distance PD

  3-5mm less than distance
• What does systolic pressure reflect the amount of?

  Force on artery walls when the heart beats