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100 Years Ago in the Archives
January 2000

A look at the past . . .

Author Affiliations

Copyright 2000 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2000

Arch Ophthalmol. 2000;118(1):73. doi:10.1001/archopht.118.1.73

The author made many experiments in regard to the changes in corneal curvature following sections made with lances of various curvatures. He also measured the astigmatism following glaucoma and cataract operations. Sections made with the Graefe knife were not considered on account of the unavoidable irregularity in puncture and counterpuncture. Of 112 cases of glaucoma in which a lance 6-9 mm broad was used, it was found that in the meridian dividing the wound the refraction sank 0.5-2.5 D, while in the meridian at right angles it rose 0.5-3 D. On an average, the astigmatism produced was 2.76 D.