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Related Experiment Videos

[Motif expressing soft print lenses. Effect on visual function].

C W Spraul1, H J Roth, S E Baumert

  • 1Universitäts-Augenklinik und Poliklinik Ulm.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|March 6, 1999
PubMed
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Special-effect contact lenses significantly impair visual functions like acuity and contrast sensitivity. This reduction in vision may affect a wearer's ability to safely operate a vehicle.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Cosmetic and therapeutic iris-changing contact lenses are widely used.
  • Potential impact of these special-effect lenses on visual function requires investigation.

Purpose of the Study:

  • To evaluate the effect of special-effect contact lenses on visual functions in healthy volunteers.

Main Methods:

  • Healthy volunteers tested with clear and special-effect (Crazy) soft contact lenses.
  • Assessed visual acuity, contrast sensitivity, visual field, mesopic vision, and subjective comfort.
  • Statistical analysis using Wilcoxon and Mann-Whitney U-tests.

Main Results:

  • Special-effect lenses reduced visual acuity and mesopic vision.

Related Experiment Videos

  • Significant constriction of the Goldmann visual field observed.
  • Contrast sensitivity decreased in photopic and some scotopic conditions; wear comfort was reduced.

    • Conclusions:

    • Special-effect contact lenses negatively impact multiple visual functions.
    • Impaired vision may compromise the ability to drive safely.