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Thesis

Night wear orthokeratology as a fast, safe, and effective correction for myopia

1 May 1999

Abstract

Background: Orthokeratology has been a topic of increasing interest and has seen increasing success over time. The following paper is a study done to determine the effectiveness and safety of a new lens design worn at night only.

Methods: Twenty-six subjects (50 eyes) with myopia between 0.500 and 4.000 with astigmatism no greater than 2.000 were fitted with the Dreimlens™ orthokeratology lens. The lenses were worn at night only, every night for six weeks. Visual acuities, refraction, slit lamp exam, keratometry, tonometry, pachymetry, and refraction were performed at one day, one week, three weeks, and six weeks into lens wear. Subjects then discontinued lens wear and were seen again in one week to determine reversibility.

Results: All eyes reached 20/30 unaided VA, 44 eyes reached 20/20 or better lasting all day for 21 of the 26 subjects (10 hrs or more). No serious health complications arose with overnight wear of the lenses and the lenses were thought to be comfortable with sleep. Within one week after discontinuing, all but one eye had returned to their original refractive error.

Conclusions: The DreimlensTM proved in this study to be a safe and effective method of reducing or eliminating low to moderate amounts of myopia.


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