To the Editor.
—The August Archives carried two letters expressing divergent attitudes toward allowing some visually handicapped drivers to use bioptic telescope systems for driving.12 Dr Fonda1 clearly expressed his view that it is dangerous to drive while wearing a bioptic telescope system. His principal objection is that when the wearer looks through the telescope, a substantial and important part of the visual field is obstructed, blocking access to key visual information about traffic and its flow. At first glance, this argument seems clear and undeniable, but, in reality, the proposition is not valid. Almost invariably, bioptic telescopes for driving are fitted to two-eyed patients, are mounted before one eye only, and are positioned as superiorly as possible in the spectacle lens carrier. If both eyes are open, the bioptic telescope creates no scotoma at all. Bioptic telescope wearers should be taught or trained to have both eyes open
Bailey IL. Bioptic Telescopes. Arch Ophthalmol. 1985;103(1):13. doi:10.1001/archopht.1985.01050010015002