3100 Open Stereoscope, Handheld
This handheld home vision therapy instrument is designed for patients who wear glasses, and can accommodate frames of any width. All Keystone View Stereoscopes are precision instruments, reasonably priced and ruggedly built for a long service life.
- Lens separation of 85 mm accommodates varying PDs as well as adequate base-out stimulation
- +5.00 D lens system accommodates any distance between near point and infinity within a 200 mm working range (the focal length of the lenses)
- Each number on the calibrated shaft marks 0.25 D change in accommodation
- Optional telescoping pedestal base for pointer training