Interocular adjustment is a feature of a stereoscope that can change the width between the two oculars (the eyepieces with lenses) of the viewer to support different eye widths.
Antiques from the collection of André Ruiter
Interocular adjustment is a feature of a stereoscope that can change the width between the two oculars (the eyepieces with lenses) of the viewer to support different eye widths.