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Related Experiment Video

Updated: Feb 26, 2026

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Power profiles in multifocal contact lenses with variable multifocal zone.

Daniel Monsálvez-Romín1, Alberto Domínguez-Vicent1, Santiago García-Lázaro1

  • 1Optometry Research Group, Department of Optics and Optometry and Vision Sciences, University of Valencia, Valencia, Spain.

Clinical & Experimental Optometry
|July 19, 2017
PubMed
Summary

The power profiles of gas permeable multifocal contact lenses vary with lens diameter, influencing visual correction. Smaller diameter lenses (XS, S) offer more near vision addition, while larger ones (L, XL) prioritize distance vision.

Keywords:
RGP multifocal lensescontact lenseslens fittingpower profilevariable addition designs

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Area of Science:

  • Ophthalmic Optics
  • Contact Lens Technology

Background:

  • Multifocal contact lens power profiles provide crucial fitting information.
  • Understanding these profiles aids in optimizing lens selection for patients.

Purpose of the Study:

  • To characterize the power profile of new gas permeable multifocal contact lenses.
  • To analyze the relationship between pupil radius and lens power distribution.

Main Methods:

  • Measurements of center-distance multifocal contact lenses with varying diameters (XS-XL) and additions (Type A, B).
  • Utilized the NIMO TR1504 optical device for power profile assessment.
  • Data presented via color maps, averaged radial profiles, and analysis of near vision portions.

Main Results:

  • Lens power addition is dependent on the distance-vision diameter.
  • Smaller diameter lenses (e.g., XS) provide higher addition compared to larger ones (e.g., XL) for a given aperture.

Conclusions:

  • Lens designs XS and S are suited for near vision enhancement.
  • Designs L and XL are optimized for distance vision correction.
  • The M design offers a balance for patients needing both near and distance vision.