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Lens opacities associated with performance-based and self-assessed visual functions.

Barbara E K Klein1, Ronald Klein, Michael D Knudtson

  • 1Department of Ophthalmology and Visual Sciences, University of Wisconsin Medical School, Madison, Wisconsin 53726, USA. kleinb@epi.ophth.wisc.edu

Ophthalmology
|August 1, 2006
PubMed
Summary

Lens opacities, even early ones, significantly impair vision. These vision impairments, particularly self-assessed ones, are more pronounced in older adults, suggesting targeted interventions could benefit them most.

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Area of Science:

  • Ophthalmology
  • Gerontology
  • Vision Science

Background:

  • Age-related lens opacities are a common cause of visual impairment.
  • Understanding the impact of lens opacities on visual function is crucial for effective management.

Purpose of the Study:

  • To investigate the relationship between the severity of lens opacities and both performance-based and self-assessed visual function.
  • To examine these relationships in individuals without other ocular comorbidities.

Main Methods:

  • Cross-sectional cohort study utilizing data from the Beaver Dam Eye Study.
  • Lens opacities were graded from photographs.
  • Performance-based visual functions (visual acuity, near vision, contrast sensitivity) and self-assessed visual functions were measured.

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Main Results:

  • Significant associations were found between lens opacity severity and performance-based visual functions (P<0.001).
  • Self-assessed visual functions showed less consistent associations with lens opacity severity (P<0.02).
  • Associations, particularly for self-assessed functions, were stronger in individuals aged 65 and older compared to younger participants.

Conclusions:

  • Lens opacities, across a spectrum of severity, are linked to decreased visual function.
  • The impact of lens opacities on self-assessed visual function is more significant in older individuals.
  • Interventions aimed at reducing lens opacity severity are likely to have a greater positive impact on older populations.