J Korean Ophthalmol Soc.  2014 Nov;55(11):1595-1599. 10.3341/jkos.2014.55.11.1595.

The Effects of Overnight Orthokeratology Lens Wear on Ocular Scatter

• Jeon HM
• Ahn DS
• Lee DJ
• Moon SJ
• Lee KH

• KMID: 2216605
• DOI: http://doi.org/10.3341/jkos.2014.55.11.1595

Abstract

PURPOSE
To evaluate the change of visual quality after wearing orthokeratology lenses overnight.
METHODS
This study included 13 patients (24 eyes) who wore orthokeratology lenses for the first time. Visual quality was assessed with the optical quality analysis system (OQAS) using the double-pass technique. The value of modulation transfer function (MTF) cutoff, Strehl ratio, and objective scatter index (OSI) were measured at baseline and 4 weeks after wearing the lenses.
RESULTS
The mean spherical equivalent decreased from -2.70 +/- 1.03 diopters (D) to 0.03 +/- 0.36 D after 4 weeks of wearing orthokeratology lenses and uncorrected visual acuity improved from log MAR 0.88 +/- 0.17 to log MAR 0.03 +/- 0.04. The MTF cutoff decreased from 38.20 +/- 11.01 to 34.79 +/- 10.30 and the Strehl ratio decreased from 0.24 +/- 0.07 to 0.21 +/- 0.07 but without statistical significance. The OSI significantly increased from 0.38 +/- 0.19 to 0.72 +/- 0.40 after wearing orthokeratology lenses.
CONCLUSIONS
Orthokeratology lenses were effective for correction of myopia and astigmatism. The OSI increased after wearing the lenses, but MFT cutoff and Strehl ratios were not affected.

Keyword

OQAS; Orthokeratology; Scatter

MeSH Terms

Astigmatism
Humans
Myopia
Visual Acuity

Reference

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