| Correlation among Myopic Correction, Axial Length and Aberration after Orthokeratology Lens Treatment in Myopic Patients. |
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Dong Hyun Lee, Ji Eun Lee |
1Department of Ophthalmology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea. jiel75@hanmail.net
2Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea. |
| 근시안에서 각막굴절교정 렌즈 처방 후 근시교정량, 안축장길이 및 고위수차와의 상관관계 비교 |
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이동현1,2⋅이지은1,2 |
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부산대학교 의학전문대학원 양산부산대학교병원 안과학교실1, 양산부산대학교병원 의생명융합연구소2 |
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| Abstract |
PURPOSE
To report the correlation among the amount of myopic correction, axial length elongation, and higher order aberrations after treatment with orthokeratology lenses in myopic patients. METHODS: Eighteen patients (36 eyes) treated with orthokeratology lenses for more than 12 months were recruited for this study. Visual acuity, spherical equivalent, axial length, and higher order aberrations were measured at baseline and 1, 6, and 12 months after wearing lenses. Correlations among them were analyzed. RESULTS: Total higher order, spherical, vertical and horizontal coma aberrations were significantly increased from 0.85 ± 1.47, −0.22 ± 0.40, 0.40 ± 0.47, 0.22 ± 0.31 to 1.11 ± 0.72, 0.10 ± 0.38, 0.79 ± 0.63, 0.66 ± 1.29 after 1 month repectively (p < 0.05), but root mean square (RMS) total and trefoil aberrations were not (p > 0.05), remaining up to 12 months.Total and corneal spherical aberrations were positively correlated to the amount of myopic correction (p = 0.001 and p = 0.028, repectively) and negatively to the amount of axial length elongation (p = 0.036 and p = 0.079, repectively). Uncorrected visual acuity and spherical equivalent were significantly improved from 0.52 ± 0.08 and −2.41 ± 0.36 to 0.07 ± 0.07 and −0.84 ± 0.32 after 1 month respectively. This improvement was maintained up to 12 months (p = 0.002 and p = 0.001, respectively). Axial length was continuously increased from 24.31 ± 0.53 mm to 24.91 ± 0.60 mm after 12 months, but showed no significant changes (p = 0.721). CONCLUSIONS: Although orthokeratology lenses were effective for the correction of myopia, they increased higher order aberrations depending on the amount of myopic correction. Physicians should consider higher order aberrations. Further studies regarding the relationship between axial length elongation and higher order aberrations to retard myopic progression should be conducted. |
| Key Words:
Aberration;Axial length;Myopia;Orthokeratology lens;Visual acuity |
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