Bioptic Telescopes-Reply

TLDR: It is unreasonable to prescribe a telescope for only one eye in the patient with binocular vision; diplopia results when looking through the telescope.

Abstract: In Reply. —The only statement with which I agree is that the driver with binocular vision, while looking through a telescope with one eye and a spectacle correction with the other, sees no scotoma in a binocular field of vision. However, it is unreasonable to prescribe a telescope for only one eye in the patient with binocular vision; diplopia results when looking through the telescope. Even though it is self-evident that an individual with binocular vision wearing a telescope before one eye and a spectacle correction before the other will experience diplopia, I experimented on myself out of curiosity. My corrected vision is 20/20 OU, and I have binocular vision while looking through the ×3 bioptic telescopic spectacle (BTS) with both eyes. Experiment 1. —I wore the ×3 BTS before either my dominant or nondominant eye while wearing the spectacle correction before the other eye. I learned that I had