Myopia reduction using corneal refractive therapy contact lenses.

Abstract

PURPOSE:

The Paragon corneal refractive therapy (CRT) lens provides a temporary reduction in myopia by molding the cornea while sleeping. This study presents our initial experience in 20 patients fit with the CRT lens.

METHODS:

Myopic patients with a spherical correction between -1.00 and -7.75 diopters (D) and astigmatism less than 1.62 D were fit and followed for an average of 5.1 months.

RESULTS:

Patients whose initial refraction was between -1.00 and -3.00 D achieved an average of 1.50 D myopic correction; those between -3.25 and -6.00 achieved an average of 2.9 D myopic correction; and those greater than -6.00 D averaged 5.8 D of correction. Uncorrected visual acuity improved an average of 7.7 lines. One hundred percent achieved 20/40 or better vision, and 55% achieved 20/20 vision. Fifty-five percent were within 0.50 D of plano, and 84% were within 1.00 D of plano. There was an overall 80% success rate.

CONCLUSIONS:

The CRT lens is an effective modality for temporary myopic correction for a restricted subset of myopic candidates. Those with a spherical manifest refraction between -1.00 and -6.00 D and up to 1.50 D of astigmatism can expect a good outcome with these lenses.

• Authors: Bruce H Koffler, Vivien M Smith
• Journal: Eye & contact lens (Eye Contact Lens) Vol. 30 Issue 4 Pg. 223-6; discussion 230 (Oct 2004) ISSN: 1542-2321 [Print] United States
• PMID: 15499255 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Adolescent
• Adult
• Contact Lenses
• Cornea (physiopathology)
• Corneal Topography
• Female
• Humans
• Male
• Middle Aged
• Myopia (physiopathology, therapy)
• Prosthesis Design
• Refraction, Ocular (physiology)
• Visual Acuity (physiology)