Fitting bioptic telescopes: Determining location and mounting angle with bioptic fitting apertures

The prescribing and fitting of spectacle-mounted telescopes (bioptic telescopes or bioptics) requires calculating the proper telescope power. It also requires determining the appropriate position within the spectacle lens and the proper angling of the telescope relative to the frame front (mounting angle).A description of bioptic fitting apertures, and their use in determining and confirming bioptic telescope location and mounting angle, is discussed.