Question

Procedure for measuring monocular PDs using a ruler: Measure the binocular PD as described earlier. Use the center of the pupil as the reference point. Before moving the ruler, note the scale reading on the ruler at the _______ of the nose. This is the right monocular PD. Subtract this reading from the binocular reading to obtain the ____ monocular PD.

A) Center; left
B) Tip; right
C) Corner; right
D) Edge; left

Answer 1

The procedure for measuring monocular PD involves a ruler and using the pupil's center as a reference point, where the center of the nose provides the right PD, and subtracting this from the binocular PD gives the left PD.

Step-by-step explanation:

The procedure for measuring monocular PDs (Pupillary Distances) using a ruler starts with measuring the binocular PD. You should use the center of the pupil as the reference point. The correct answer to the question is A) Center; left. When noting the scale reading on the ruler at the center of the nose, you are finding the right monocular PD. To obtain the left monocular PD, you subtract the right monocular PD from the total binocular PD.