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      • Article: found

      Photo-Cell Device for Slit-Beam Adjustment to the Optical Axis of the Eye in Scheimpflug Photography

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          Abstract

          In the photographic documentation of lens findings according to Scheim-pflug’s principle, a good reproducibility of the camera adjustment to the patient’s eye is prerequisite for quantitative densitometric evaluations. To ensure reproducible adjustment, the camera was equipped with a green blinking target for patient fixation, and with two phototransistors. These are stimulated by the slit light reflected from the patient’s cornea and trigger an acoustical signal when the slit beam is perpendicular. When the patient fixates the target light, and the pitch of the acoustical signal indicates a perpendicular alignment, the slit passes through the optical axis of the eye. Such adjustment makes it possible to take photos of a reproducible central optical section of the lens.

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          Author and article information

          Journal
          ORE
          Ophthalmic Res
          10.1159/issn.0030-3747
          Ophthalmic Research
          S. Karger AG
          0030-3747
          1423-0259
          1980
          1980
          03 December 2009
          : 12
          : 2
          : 78-86
          Affiliations
          Abteilung Biochemie des Auges, Klinisches Institut für experimentelle Ophthalmologie der Universität, Bonn
          Article
          265066 Ophthalmic Res 1980;12:78–86
          10.1159/000265066
          9d6224c1-4540-45e7-9917-184f0726cd09
          © 1980 S. Karger AG, Basel

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          History
          : 24 August 1979
          : 11 October 1979
          Page count
          Pages: 9
          Categories
          Original Paper

          Vision sciences,Ophthalmology & Optometry,Pathology
          Follow-up lens photography,Scheimpflug photography,Reproducibility in lens photography,Cataract documentation,Slitbeam adjustment

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