Clinical research on overnight orthokeratology for vision quality

Abstract

AIM:To explore the changes of visual quality in myopic eyes undergoing overnight orthokeratology.METHODS:Fifty-five myopia adolescents(110 eyes)were recruited. Optical scattering index(OSI),MTF cut off, Strehl ratio, OQAS value(OV100%、OV20%、OV9%), index of highest asymmetry(IHA),index of highest decentration(IHD),aberration coefficient(ABR)were performed before and 1wk,1,3 and 6mo after wearing orthokeratology with OQASTMⅡ and corneal topography. RESULTS:The uncorrected visual acuity(UCVA)before wearing orthokeratology lens was 0.21±0.13,but at 1wk,1,3 and 6mo after wearing were 0.48±0.15,0.72±0.14,0.93±0.13 and 1.02±0.13,respectively,and there were statistical differences before and after wearing(PPPPPPPPCONCLUSION:Orthokeratology deteriorates vision quality. But the loss is acceptable. Orthokeratology can improve UCVA quickly and effectively. It is worth of affirmation on control of myopia.

Keywords

• orthokeratology
• uncorrected visual acuity
• visual quality
• OQASTMⅡ