Long-term follow-up of orthokeratology corneal reshaping using wavefront aberrometry and contrast sensitivity

Long-term follow-up of orthokeratology corneal reshaping using wavefront aberrometry and contrast sensitivity

Author Stillitano, Lane Autor UNIFESP Google Scholar
Schor, Paulo Autor UNIFESP Google Scholar
Lipener, Cesar Autor UNIFESP Google Scholar
Hofling-Lima, Ana Luisa Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Purpose. To evaluate changes in ocular wavefront aberrations and contrast sensitivity during 1-year follow-up of overnight orthokeratology. Methods. Prospective stud), of 26 eyes that underwent orthokeratology with the BE lens design. Wavefront measurements were analyzed at baseline and after 1. 8, 30 90. 180, and 365 nights of orthokeratology for a 6.5-mm pupil diameter. Contrast sensitivity 1 year after orthokeratology was compared to the baseline value under photopic conditions and mesopic conditions. with and without glare, in the spatial frequencies of 1.5, 3, 6, 111 and 18 cycles/degree. A P Value of less than 0.05 was statistically significant. Results. Higher-order aberration root-mean-square HOA-RMS) increased statistically significantly from 0.41 +/- 0.12 mu m to 1.04 +/- 0.32 mu m up to night 8. Defocus (Z4) decreased until night 8 and then stabilized. Astigmatism (Z3 + Z5) did not change. There was a sevenfold increase in spherical aberration (Z12) until night 8, which Subsequently remained unchanged (P<0.001). Coma (Z7 + Z8) increased until night 90 and then stabilized (P<0.001). Other Zernike modes showed stability at night 1, with the exception of quadrafoil (Z14) (P=0.048). Mesopic contrast sensitivity. with and without glare, at 18 cycles/degree, decreased but failed to reach statistical significance (P=0.922 and P=0.827. respectively). Conclusions. Most optical aberrations stabilized within the first week after beginning orthokeratology with BE lens. There was not a statistically significant reduction in contrast sensitivity 1 year after treatment.
Keywords orthokeratology
corneal reshaping
contrast sensitivity
Language English
Date 2008-05-01
Published in Eye & Contact Lens-science and Clinical Practice. Philadelphia: Lippincott Williams & Wilkins, v. 34, n. 3, p. 140-145, 2008.
ISSN 1542-2321 (Sherpa/Romeo, impact factor)
Publisher Lippincott Williams & Wilkins
Extent 140-145
Origin http://dx.doi.org/10.1097/ICL.0b013e318145ab5d
Access rights Closed access
Type Article
Web of Science ID WOS:000258835400002
URI http://repositorio.unifesp.br/handle/11600/30658

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