A hand-held, two-channel stimulator-ophthalmoscope
M. A. Sandberg and M. Ariel
A hand-held optical system for presenting focused stimuli on known retinal
areas by direct ophthalmoscopy is described. The optical system provides a
time-modulated stimulus beam of variable dimension, retinal illuminance,
wave-length, and polarization, and a steady background beam of variable
retinal illuminance and wavelength. Both beams enter the patient's eye in
maxwellian-view for precise control of the ratio of stimulus to background
retinal illuminance. The stimulator-ophthalmoscope allows the examiner to
compensate easily for variable fixation.
