What question did this study set out to answer?

The aim is to compare two refitting techniques for long-term polymethyl methacrylate lens wearers to evaluate their impact on corneal recuperation and vision stability.

March 21, 2026

A Comparison of Two Techniques of Refitting Long‐Term Polymethyl Methacrylate Contact Lens Wearers

Key Points

The aim is to compare two refitting techniques for long-term polymethyl methacrylate lens wearers to evaluate their impact on corneal recuperation and vision stability.
Compared two refitting techniques after removal of PMMA lenses: complete cessation of lens wear and immediate refitting with Polycon lenses.
Involved 11 participants who wore hard contact lenses for 3+ years with a minimum wear time of 8 hours per day.
Assessed changes in corneal curvature and refractive stability post-refitting.
Refitting with Polycon lenses did not significantly inhibit corneal recuperation but slowed it.
Participants showed improved and more stable vision with the Polycon lens compared to complete cessation of wear.

Abstract

ABSTRACT Two techniques for fitting long‐term polymethyl methylcrylate (PMMA) lens wearers with a gas‐permeable hard lens are compared. These are: complete cessation of all lens wear for the period necessary to achieve stability in the patient's refraction and corneal curvature, and immediate refitting with a Polycon lens. Eleven patients who had worn hard contact lenses for at least 3 years and had wearing times of at least 8 hr per day were refitted with each technique. Refitting with Polycon lenses slowed but did not otherwise inhibit the recuperative changes taking place in the cornea after PMMA lens removal; vision was better and more stable with this group.

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