Author(s)

Frank Spors, Donald J. Egan, Jie Shen, Lance E. McNaughton, Stuart Mann, Neil M. Patel

College of Optometry, Pomona, CA.
Western University of Health Sciences, Pomona, CA.

Purpose: The purpose of this study was to evaluate the change in corneal wavefront aberrations in young adults who have been fit with multifocal soft contact lenses for myopia progression control. Findings have been analyzed for statistical significance and clinical relevance and compared to reportedly successful Orthokeratology outcomes. Methods: The dominant eye of 40 participants (27 women, 13 men; mean age 27.3 ± 3.2 years; range 23 to 39 years) was fit with Proclear Multifocal center distance lenses (Coopervision, Pleasanton, USA) having a variety of distance powers and reading additions. Refractive errors were limited to a range of –6.00 D up to +1.00 D of sphere, and no greater than –1.00 D of cylinder. Corneal wavefront measurements were performed over 6 mm diameters with a Zeiss Atlas 9000 corneal topographer (Zeiss Meditec, Dublin, USA) prior to, and following lens fitting. Data were converted into rectangular Fourier optics terms M, J₀, J₄₅ and RMS values for each reading addition were statistically analyzed. Following evaluation of statistical significance and clinical relevance, results were compared to published data from successful Orthokeratology treatments. Results: Statistically significant changes in higher order aberrations were detected for lenses of all reading additions. Lens groups with higher Add-powers demonstrated stronger changes with increased significance. Final RMS values relating to 2^nd, 3^rd and 4^th Zernike Orders reached clinical significance with a wavefront error of 0.10 μm, the equivalent of 0.25D. Moreover, as Add-powers increased, 3^rd and 4^th order aberrations likewise showed an increase. Pre-fitting astigmatism values accounted for the highest recorded aberrations and remained predominantly unchanged. Conclusion: Proclear Multifocal center-distance contact lenses were found to increase higher order wavefront aberrations in a manner dependent on their Add-power. In comparison to successful Orthokeratology outcomes, the amounts of resulting aberrations are notably different.

Multifocal Soft Contact Lenses; Wavefront Aberrations; Myopia; Myopia Progression Control; Orthokeratology; Zernike Polynomials

F. Spors, D. J. Egan, J. Shen, L. E. McNaughton, S. Mann and N. M. Patel, "Corneal Wavefront Aberrations in Patients Wearing Multifocal Soft Contact Lenses for Myopia Control," Open Journal of Ophthalmology, Vol. 2 No. 3, 2012, pp. 45-53. doi: 10.4236/ojoph.2012.23011.