Myopia reduction using corneal refractive therapy contact lenses.
OBJECTIVE
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.
Koffler
Bruce H
BH
Kentucky Center for Vision, 120 North Eagle Creek Drive, Suite 431, Lexington, KY 40509, USA. kyctrvis@IWebworks.com
Smith
Vivien M
VM
D000293:Adolescent; D000328:Adult; D003261:Contact Lenses; D003315:Cornea / Q000503:physiopathology*; D019781:Corneal Topography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000628:therapy*; D011474:Prosthesis Design; D012029:Refraction, Ocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology