Question

__________ is defined as a line passing from the center of the pupil to the object of regard. This is the line that desirably passes through the optical center of the lenses and is the basis upon which the measurement of interpupillary distance rests.

A) Line of sight
B) Visual axis
C) Focal point
D) Pupillary axis

Answer 1

The pupillary axis is defined as a line that passes from the center of the pupil to the object of regard.

Step-by-step explanation:

The correct answer to the question is Pupillary axis.

The pupillary axis is defined as a line that passes from the center of the pupil to the object of regard. It is the line that desirably passes through the optical center of the lenses. The measurement of interpupillary distance is based on this axis.

For example, when adjusting the distance between the eyepieces of a binocular, the pupillary axis is used as a reference to ensure that the optical center of each lens aligns with the pupil of each eye.