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Assessing a modified fitting approach for improved multifocal contact lens fitting.

Mohinder Merchea1, David Evans2, Shane Kannarr3

  • 1Alcon Research, LLC., Fort Worth, TX, USA.

Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association
|June 30, 2019
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Summary
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A new multifocal contact lens fitting guide significantly reduces the number of lenses needed for presbyopia correction. This improved guide enhances the fitting process for eye care practitioners and patients.

Keywords:
Multifocal contact lenses

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Area of Science:

  • Ophthalmology
  • Optometry
  • Biomedical Engineering

Background:

  • Presbyopia correction with multifocal contact lenses (MF CLs) is a growing area in vision care.
  • Effective fitting guides are crucial for successful patient outcomes and practice efficiency.

Purpose of the Study:

  • To compare the effectiveness of a modified multifocal contact lens fitting guide versus a previous version.
  • To evaluate the guides' performance in soft contact lens wearers requiring presbyopia correction.

Main Methods:

  • An international, multicenter, prospective, randomized, subject-masked study was conducted.
  • 183 presbyopic subjects were randomized to fitting with either the modified or previous MF CL fitting guide.
  • The primary endpoint was the number of MF CLs required for successful fitting.

Main Results:

  • The modified guide required fewer lenses per eye (1.2 ± 0.5) compared to the previous guide (1.4 ± 0.5).
  • 82.8% of eyes were successfully fit with one pair of MF CLs using the modified guide, versus 65.1% with the previous guide.
  • Eye care practitioners reported a higher ease of fit with the modified guide (63.6%) than the previous guide (33.3%).

Conclusions:

  • The modified fitting guide demonstrated superiority in reducing the number of MF CLs needed for successful presbyopic patient fitting.
  • This enhancement streamlines the fitting process and improves practitioner experience.