March 1992
Volume 33, Issue 3
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Articles  |   March 1992
Intraocular light scattering in age-related cataracts.
Author Affiliations
  • P W de Waard
    Institute of Ophthalmology, Erasmus University Rotterdam, The Netherlands.
  • J K IJspeert
    Institute of Ophthalmology, Erasmus University Rotterdam, The Netherlands.
  • T J van den Berg
    Institute of Ophthalmology, Erasmus University Rotterdam, The Netherlands.
  • P T de Jong
    Institute of Ophthalmology, Erasmus University Rotterdam, The Netherlands.
Investigative Ophthalmology & Visual Science March 1992, Vol.33, 618-625. doi:
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    • Get Citation

      P W de Waard, J K IJspeert, T J van den Berg, P T de Jong; Intraocular light scattering in age-related cataracts.. Invest. Ophthalmol. Vis. Sci. 1992;33(3):618-625.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Intraocular light scattering was studied in 34 controls and 65 patients with cortical, nuclear, or posterior subcapsular cataracts by measuring forward scatter and backscatter. Forward scatter was measured by the psychophysical direct compensation method. Backscatter was determined with the Lens Opacity Meter of Interzeag. Contrast sensitivity loss caused by forward scatter was assessed with a glare tester (Vistech MCT 8000). Mean forward scatter was in the upper range for subcapsular cataracts compared to nuclear and cortical cataracts. Experimental results of the glare test (the contrast loss) deviated systematically from expected results based on measured forward scatter. Mean backscatter was largest for nuclear, intermediate for posterior subcapsular, and almost zero for cortical cataracts. Thus, each cataract has a characteristic mean ratio between forward scatter and backscatter. However, this ratio varied considerably among individuals, especially for cortical and posterior subcapsular cataracts. As a rule, forward scatter cannot be derived from backscatter (or the slit-lamp image).

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