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| Anterior chamber optical quality evaluation of oculyzer-guided, customized PTK for irregular astigmatism induced by corneal macula |
| Hu Yukun, Ma Yimin, Gao Xiaowei, Li Wenjing, Guo Yunlin, Dong Jing |
| Department of Ophthalmology, the 474th Hospital of the Chinese People′s Liberation Army, Urumchi 830013, China |
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Abstract Objective To evaluate anterior chamber optical quality with oculyzer-guided, customized phototherapeutic keratectomy (PTK) for irregular astigmatism induced by corneal indentations. Methods This was a retrospective study. Six patients (8 eyes) with corneal indentations who were treated from February 2011 to August 2013 in the Department of Ophthalmology at the 474th Hospital of the Chinese People′s Liberation Army were included in the study. All patients underwent oculyzer-guided, customized PTK and were followed up at 1 month, 3 months, 6 months and 1 year postoperatively. Postoperative astigmatism, index of surface variance (ISV), index of height asymmetry (IHA), index of vertical asymmetry (IVA), index of height decentration (IHD), corneal aberration, lower order aberrations, higher order aberrations, spherical aberrations (C13), horizontal coma (C8), vertical coma (C9), and clover aberrations (C11) were evaluated after the operation at 1 month, 3 months, 6 months, 1 year. A paired t-test was used for comparison of the data before and after treatment. Results After 6 months, the astigmatic refractive error was 0.16±0.19 D, and the difference was significant compare with preoperation (t=3.801, P<0.05). There were no significant differences in the C13, C8, C9 or C11. However, the differences in ISV, IHA, IVA, IHD, total aberrations, lower order aberrations, and higher order aberrations were statistically significant (t=-3.452, -4.907, -3.476, -4.353, -4.608, -4.548, -3.770, P<0.05). Conclusion Oculyzer-guided, customized PTK for irregular astigmatism induced by corneal indentation is safe and effective, visual quality improved.
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Corresponding Authors:
Li Wenjing, Email: 123155504@qq.com
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