• The viewing of projected stereoslides can be achieved by either prismatic or polarized modalities. Two new projection lenses were designed for polarized split-frame stereoscopy. These lenses fit any of the commonly available (35 mm) projectors.
Parel J, Karrenberg FG, Denham DB, Norton EWD. Split-Frame StereoscopyA New Projection System. Arch Ophthalmol. 1983;101(4):653-657. doi:10.1001/archopht.1983.01040010653027