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It is said that if within five years after graduation an oculist does not devise "A New Ophthalmoscope" his wife and intimate friends begin to make mysterious visits to the best alienists concerning the man's mental condition. I have concluded that it will not do for me to hold out any longer. The little device I show you today is designed to give the working oculist an instrument with double or treble the number of useful lenses in the ordinary ophthalmoscope, without the complicated and bothersome Rekoss-disc, without a handle, that does not need a case, and that is comparatively inexpensive. The lenses are arranged in two sets independent of each other, each set in parallel continuous grooves or channels similar to the Morton instrument in this one respect. Each set of lenses is propelled by a drive-wheel operating a toothed wheel for each of the two sets of lenses,
GOULD GM. AN INEXPENSIVE 60-LENS OPHTHALMOSCOPE WITHOUT REKOSS-DISC.. JAMA. 1898;XXXI(16):911. doi:10.1001/jama.1898.92450160030002i