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Related Experiment Videos

Multifocal contact lenses--look again!

C M Hutnik1, D O'Hagan

  • 1Department of Ophthalmology, University of Western Ontario, London.

Canadian Journal of Ophthalmology. Journal Canadien D'Ophtalmologie
|April 1, 1997
PubMed
Summary
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Aspheric multifocal contact lenses offer a viable alternative for many presbyopes, providing good near vision and contrast sensitivity comparable to spectacles. However, some visual disturbances may occur, particularly in low light conditions.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Presbyopia, the age-related loss of accommodation, affects near vision.
  • Multifocal contact lenses (MCLs) are an option to correct presbyopia.
  • Aspheric progressive simultaneous vision designs represent one type of MCL.

Purpose of the Study:

  • To evaluate the visual performance and fitting characteristics of aspheric progressive simultaneous vision MCLs.
  • To assess patient tolerance of potential visual deficits associated with these lenses.

Main Methods:

  • Clinical evaluation of visual acuity, stereoacuity, and subjective visual quality.
  • Assessment of fitting ease based on manufacturer guidelines.
  • Comparison with spectacle correction where applicable.

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Main Results:

  • Lenses caused a loss of distance visual acuity and reduced stereoacuity.
  • Mild to moderate visual disturbances (glare, haloes) were reported, especially at night.
  • Near visual acuity and contrast sensitivity were comparable to spectacles for some designs.
  • Lenses were easy to fit.

Conclusions:

  • Aspheric progressive simultaneous vision MCLs may be well-tolerated by motivated young presbyopes.
  • These lenses can be an acceptable alternative for presbyopes seeking convenience and improved cosmesis.
  • Suitability depends on occupational visual demands; not ideal for those requiring precise distance acuity and stereopsis.