title: Corneal Aberrations, Contrast Sensitivity, and Light Distortion in Orthokeratology Patients: 1-Year Results.
abstract: Purpose.To evaluate the corneal higher-order aberrations (HOA), contrast sensitivity function (CSF), and light distortion (LD) in patients undergoing orthokeratology (OK).Methods.Twenty healthy subjects (mean age: 21.40 ± 8 years) with mean spherical equivalent refractive error M = -2.19 ± 0.97 D were evaluated at 1 day, 1 month, and 1 year after starting OK treatment. Monocular LD, photopic monocular CSF, and corneal HOA for 6 mm pupil size were measured.Results.LD showed an increase after the first night (p< 0.05) and recovery to baseline after 1 month, remaining stable after 1 year (p> 0.05). Spherical-like, coma-like, and secondary astigmatism HOA RMS increased significantly (p≤ 0.022) from baseline to 1-month visit, remaining unchanged over the follow-up. Contrast sensitivity for medium frequencies (3.0, 4.24, and 6.00 cpd) was significantly correlated with LD parameters at baseline (r≤ -0.529,p< 0.001). However, after 1 year of treatment, this correlation was only statistically significant for 12 cpd spatial frequency (r≤ -0.565,p< 0.001). Spherical-like RMS for 6 mm pupil size correlated with irregularity of the LD (r= -0.420,p< 0.05) at the 1-year visit.Conclusion.LD experienced by OK patients recovers after one month of treatment and remains stable in the long term while optical aberrations remain significantly higher than baseline.
authors.affiliation: Private Practice, Onda, Castellon, Spain; Optometry Research Group, Department of Optics & Optometry & Vision Sciences, Universidad de Valencia, Valencia, Spain.
authors.forename: Elena
authors.identifier: 0000-0003-2829-5691
authors.initials: E
authors.lastname: Santolaria-Sanz
authors.affiliation: Optometry Research Group, Department of Optics & Optometry & Vision Sciences, Universidad de Valencia, Valencia, Spain.
authors.forename: Alejandro
authors.identifier: 0000-0001-8014-3279
authors.initials: A
authors.lastname: Cerviño
authors.affiliation: CEORLab-Center of Physics (Optometry), Universidade do Minho, Braga, Portugal.
authors.forename: José M
authors.identifier: 0000-0001-9050-4170
authors.initials: JM
authors.lastname: González-Méijome