"To know the truth that we lack knowledge is in itself a higher knowledge."—Humboldt.1
The importance and the amount of scientific knowledge hidden in the older literature are generally not realized and can hardly be imagined.
In gathering material for a book on Purkyně about to be published, I was astonished to find many unknown facts, some of which seem to be unbelievable. I had not intended to publish this or any other paper regarding my findings before presenting all the data I have compiled. But, being convinced that one fact is of such interest as to warrant its immediate publication, I have decided to announce it forthwith.
THE ORIGIN OF OPHTHALMOSCOPY
From the available evidence it clearly appears that the interior and the background of the eye of both animals and man were first observed by John Evangelist Purkyně, who made enormous contributions to the sciences, including medicine,
THAU W. PURKYNĚA PIONEER IN OPHTHALMOSCOPY. Arch Ophthalmol. 1942;27(2):299–316. doi:10.1001/archopht.1942.00880020083007
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