[Case histories and "medical statistics" 200 years ago--case notes by Jung-Stilling on his cataract operations 1773-1778]. / Krankengeschichten und "Medizinstatistik" vor 200 Jahren--Aufzeichnungen von Jung-Stilling über seine Staroperationen 1773-1778.

At the time of Goethe, Jung-Stilling (1740-1817) was highly regarded for his cataract operations. He had a general practice in Elberfeld from 1772 to 1778 and began to carry out his eye operations there. Unpublished, handwritten notes on 92 cataract operations were found only a short time ago in the library of the University of Basle. These notes show us that Jung-Stilling wrote proper case histories that correspond somewhat to the style we use today. Apparently these notes, Report on my cataract cures and healing methods of other eye diseases, formed the basis for the statistical result he published in Marburg in 1791 that represent his main medical work: Methods of taking out cataracts and of healing...

[A rare trial eyeglass case with binocular trial lenses]. / Ein seltener Probierbrillenkasten mit Binokularprobiergläsern.

In this article the author describes a rare trial frame case in the medical history collection of the Ruhr University at Bochum. It has 24 binocular trial lenses which are similar to be early "Nuremberg wire spectacles." The lens power is expressed as the focal length, measured in Rhenish inches. Converted into diopters, the refractive power of the lenses ranges from +/- 1.0 to +/- 8.0 D.spherical. The case also contains six pairs of plane lenses tinted in various intensities of azure blue and four pairs of plane lenses tinted smoke-gray. It contains no astigmatic lenses. Since the metric system, with the diopter as a unit of refractive power, was introduced in the optical industry in 1875, it may be assumed that this case was in use before then. However, the design of the binocular trial frames suggests that they may be considerably older.

[Wilhelm Conrad Roentgen: from the reminiscences of the Swiss ophthalmologist Ernst Wölfflin]. / Wilhelm Conrad Röntgen: aus den Erinnerungen des Schweizer Ophthalmologen Ernst Wölfflin.

A medical certificate concerning a rather serious eye condition suffered by the young W. C. Roentgen has been discovered in the archives of the German Roentgen Museum in Remscheid-Lennep. Written in French in 1865 by the Utrecht ophthalmologist Dr. H. Snellen, it suggested the idea of reporting some biographical details recorded by Ernst Wölfflin, professor of ophthalmology in Basel, about W. C. Roentgen, his friend of many years standing.