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[Cataract diagnosis using scattered light at 700 nm]
J Strobel1, B Reck, M L Rödinger
1Universitäts-Augenklinik Giessen.
Klinische Monatsblatter Fur Augenheilkunde
|December 1, 1990
Summary
The Opacity Lensmeter 701 measures scattered light to assess lens opacities. It correlates well with visual acuity for nuclear cataracts but is less useful for other types and requires pupillary diameter reporting.
Area of Science:
- Ophthalmology
- Biomedical Optics
Background:
- Lens opacities, such as cataracts, impair vision.
- Objective measurement of lens opacity is crucial for diagnosis and monitoring.
- Scattered light is a potential indicator of lens opacity.
Purpose of the Study:
- To evaluate the Opacity Lensmeter 701 for objective, quantitative assessment of lens opacities.
- To determine the influence of pupillary diameter and cataract type on scattered light measurements.
Main Methods:
- Assessed visual acuity and scattered light in 150 eyes using the Opacity Lensmeter 701 at 700 nm.
- Examined the effect of pupillary diameter on scattered light measurements in 50 selected eyes.
Main Results:
- Significant correlation between visual acuity and scattered light for nuclear cataracts.
- No significant correlation for posterior subcapsular or cortical cataracts.
- Pupillary diameter significantly correlated with scattered light in eyes with cataracts, but less so in normal eyes.
Conclusions:
- The Opacity Lensmeter 701 is valuable for population studies of nuclear cataracts but has limited individual diagnostic value.
- Pupillary diameter significantly influences scattered light measurements in cataract patients and should be reported.