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Related Experiment Videos

Visual performance with aspheric rigid contact lenses.

L D Oxenberg1, L G Carney

  • 1College of Optometry, Ohio State University, Columbus.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|December 1, 1989
PubMed
Summary

Front surface aspheric rigid contact lenses may improve vision by controlling spherical aberration. However, individual responses to these specialized contact lenses varied significantly among participants.

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Area of Science:

  • Ophthalmology and Optometry
  • Visual Optics

Background:

  • Spherical aberration can negatively impact visual acuity.
  • Aspheric lens designs aim to correct for optical aberrations, potentially enhancing vision.

Purpose of the Study:

  • To compare visual performance between front surface aspheric rigid contact lenses, spherical rigid contact lenses, and spectacle correction.
  • To investigate the efficacy of aspheric contact lens designs in controlling spherical aberration and improving visual function.

Main Methods:

  • Ten subjects were fitted with four different optical corrections: two types of front surface aspheric rigid contact lenses, one spherical rigid contact lens, and spectacle correction.
  • Visual acuity was measured as a function of aperture size for each correction to objectively assess visual performance.

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Main Results:

  • Front surface aspheric rigid contact lenses demonstrated the potential to enhance visual performance.
  • A significant degree of inter-subject variability was observed in the visual response to aspheric lens designs.
  • Factors beyond lens surface shape, such as lens positioning and stability, may also influence visual outcomes.

Conclusions:

  • Aspheric contact lens designs show promise for improving visual performance by managing spherical aberration.
  • Individual patient factors play a crucial role in the effectiveness of aspheric contact lens correction.
  • Further research should consider the impact of lens fit and stability on visual outcomes with aspheric contact lenses.