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Corneal Aberrations, Contrast Sensitivity, and Light Distortion in Orthokeratology Patients: 1-Year Results

2016; Hindawi Publishing Corporation; Volume: 2016; Linguagem: Inglês

10.1155/2016/8453462

2090-0058

Elena Santolaria-Sanz, Alejandro Cerviño, José Manuel González‐Meijome,

Ocular Surface and Contact Lens

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.