OPT-2375L Refractometry Lab Unit 1 Flashcards
As we approach neutrality during retinoscopy, two characteristic changes in the reflex are:
faster, brighter
Neutrality can be verified by moving in to see _______ motion and moving out to see ________ motion.
With/Against
The closer the retinoscopic reflex to neutral, the duller the reflex is.
False
An “Against” reflex is neutralized with a ________ lens.
Minus
If the working distance is 67 cm, then _______ D should be added to the gross retinoscopy.
-1.50 D
Visual Acuity measurements should be taken on every patient before any test is performed or drug administered.
True
During retinoscopy, the neutral zone is found with a +3.50 D lens in front of the eye. The working distance is 50 cm. What is the objective RX with compensation?
+1.50 D
Using a 67 cm working distance, neutrality is found with a +1.00 lens in front of the eye. What is the refractive error?
Myope
If a working lens is used during retinoscopy, then no compensation is necessary.
True
The retinoscope’s streak is always _____________ to its axis.
perpendicular
Telephone triage is knowing how to schedule a patient (Emergency/Urgent, Priority or Elective) upon hearing their symptoms on the telephone.
True
What is the common abbreviation used for “history”?
Hx
Given the following, decide whether to schedule the patient as Emergency/Urgent, Priority or elective: Patient “X” is a 68 year old female who complains of two episodes of a curtain closing sideways over her right eye. After about 10 minutes, her vision cleared to normal. No other symptoms. She should be booked as:
Emergency/Urgent
What is the common abbreviation used for “Prescription”?
Rx
Given the following information, decide how to telephone triage and schedule the patient: Patient “X” is a 42-year-old male who complains of blurring at near. It has been gradually getting worse over the past six months. He finds he must now hold the newspaper at arm’s length.
Elective
