ABSTRACT
The ophthalmoscope, which is an indispensable tool of our profession, is now taken for granted. It is often forgotten that it was only just over 150 years ago that the first binocular ophthalmoscope was invented. The early instruments were not popular for a variety of reasons. Australians Donald Schultz and Gerald Crock played a major role in improving this instrument and developing the modifications that turned it into an everyday tool of all ophthalmologists.
Subject(s)
Ophthalmoscopes/history , Vision, Binocular , Australia , Equipment Design/history , History, 20th Century , Humans , Ophthalmology/history , Ophthalmoscopy/historyABSTRACT
A study was undertaken to determine whether involuntary user movement provides a basis for relaxing the measurement conditions for evaluating the potential optical radiation hazards to the eye from slit lamps and indirect ophthalmoscopes. This was accomplished by assessment of the extent to which light from these devices can be maintained in focus on a 1-mm-diameter fiber-optic cable for 45 s. The results suggest that, although involuntary user movements can be significant, they do not provide a basis for relaxing the measurement conditions for evaluating the potential optical radiation hazards to the cornea and lens from slit lamps and indirect ophthalmoscopes.
