What does the term “pupil size” refer to in an eye examination?

The term "pupil size" specifically refers to the diameter of the pupil, which is the circular opening in the center of the iris that allows light to enter the eye. During an eye examination, measuring pupil size is crucial for assessing how well the pupils react to light and overall eye health. A normal pupil size typically ranges from 2 to 6 millimeters in diameter, depending on factors like lighting conditions and individual variations. Changes in pupil size can indicate various medical conditions or potential neurological issues, which emphasizes the significance of this measurement in optometry. Therefore, understanding pupil diameter is essential for technicians and optometrists in diagnosing and monitoring patients' visual and overall health.