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A new magnifying indirect stereo ophthalmoscope.

作者信息

Cuypers M J, Constable I J

机构信息

Lions Eye Institute, University of Western Australia, Nedlands.

出版信息

Retina. 1992;12(2):141-6. doi: 10.1097/00006982-199212020-00011.

DOI:10.1097/00006982-199212020-00011
PMID:1439245
Abstract

A new magnifying indirect stereo ophthalmoscope had been designed, built, and tested. Magnification is achieved by means of Keplerian telescopic systems mounted in each eyepiece. Schmidt or Pechan prisms are incorporated to shorten the length of the telescopic systems. Using a +20 diopter condensing lens, the total retinal magnification achieved with this system varies from 5.6x at a 40-cm observation distance to the aerial image to 9.4x at a 25-cm observation distance. When the fundus is viewed through a dilated pupil extraordinary stereopsis is obtained. When combined with the magnification, this stereopsis greatly enhances the view of the posterior segment of the eye.

摘要

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