Final answer:
It is true that modern devices use photographs to measure interpupillary distance and segment height for eyeglasses fitting.
Step-by-step explanation:
True or false: There are instruments available for taking a wearer's interpupillary distance that make use of a photograph of the wearer's eyes with the frame in place. PD and segment height measurements are determined using the picture. The statement is true. There are indeed modern optometric devices and methods that utilize photography to measure the interpupillary distance (PD) and segment height of an individual’s eyes with their glasses on. These measurements are essential for the proper fitting of eyeglasses and ensuring that lenses align correctly with the pupils for optimal vision.