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Related Experiment Videos

Light scatter in aging and cataractous human lens.

S Siik1, P J Airaksinen, A Tuulonen

  • 1Department of Ophthalmology, University of Oulu, Finland.

Acta Ophthalmologica
|June 1, 1992
PubMed
Summary

The Lens Opacity Meter 701 objectively assesses human lens opacities. It effectively distinguishes between cataractous and non-cataractous eyes, with notable accuracy for cortical cataracts.

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Area of Science:

  • Ophthalmology
  • Biomedical Optics

Background:

  • Age-related changes in the human lens can lead to opacities, commonly known as cataracts.
  • Cataracts are a leading cause of visual impairment globally, necessitating reliable methods for assessment.

Purpose of the Study:

  • To evaluate the efficacy of the Lens Opacity Meter 701 for objective assessment of human lens opacities.
  • To determine if the device can differentiate between various types of cataracts and healthy lenses.

Main Methods:

  • Light scattering measurements of the human lens were performed using the Lens Opacity Meter 701.
  • 127 eyes (43 healthy, 84 with cataracts) were analyzed, categorizing cataracts into cortical, nuclear, posterior subcapsular, and mixed types.

Main Results:

  • Age accounted for nearly 90% of light scatter variation in non-cataractous eyes.
  • Cataractous eyes showed significantly higher mean scatter values than age-matched controls (p < 0.0001).
  • Cortical cataracts exhibited the highest scatter values; other types were not significantly different from each other.

Conclusions:

  • The Lens Opacity Meter 701 can objectively identify cataractous versus non-cataractous eyes.
  • The device demonstrates potential for distinguishing advanced cortical cataracts from other lens opacities.
  • Light scatter measurements correlate significantly with visual acuity, though with variability below 60 scatter units.

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