In the present method of treatment of retinal detachments by diathermic punctures it is important to control the placing of the perforations by simultaneous observations with the ophthalmoscope. It is therefore essential that the transparency of the cornea should not be impaired during the operation, otherwise ophthalmoscopy is impossible. To obviate the drying of the cornea a Zeiss contact glass has been applied to the globe. The use of the regular Zeiss contact glass, however, entails several difficulties: One must dispense with the directive suture at the limbus, and one must perform the measurement of the chord distance from the limbus against the glass. Also, if the operative field lies nasally or temporally, the application of the Zeiss contact glass is impossible because the wide scleral part touches the palpebral angle when the globe is turned aside, and the glass is simply lifted up.
I have attempted to
Klein M. CONTACT GLASS FOR USE IN OPERATIONS ON RETINAL DETACHMENT. Arch Ophthalmol. 1935;13(2):250–251. doi:10.1001/archopht.1935.00840020110012
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