Laser in situ keratomileusis for high myopia using a small ablation zone and large aspheric transition zone.
Laser in situ keratomileusis for high myopia using a small ablation zone and large aspheric transition zone.
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DOI：
10.3928/1081-597x-20040903-07
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发表时间：
2004-09
影响因子：
2.4
通讯作者：
A. Vongthongsri;Nutharin Phusitphoykai;Tulaya Tungsiriput
中科院分区：
文献类型：
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作者：
A. Vongthongsri;Nutharin Phusitphoykai;Tulaya Tungsiriput
目的评价采用Nidek NAVEX系统的小切削区（光学区，OZ）和大非球面过渡区（OATz）的准分子激光原位角膜磨镶术（LASIK）的有效性和可预测性。方法：我们报告了一项前瞻性非随机研究，LASIK治疗高度近视18例23只眼，采用小切削。光学区在3和3.8 mm之间，过渡区（TZ）在7和7.8 mm之间。术前检查包括最佳眼镜矫正视力（BSCVA）、屈光度和角膜地形图。通过Nidek OPD-Scan测量所有眼睛，并将数据导入FinalFit软件。使用非球面轮廓（OATz）编号5至7。术后记录BSCVA、裸眼视力（UCVA）、屈光度、眩光和夜间视力的问卷主观评价。结果基线时，平均等效球镜屈光度为-7.03 +/- 2.39 D（范围-5.50至-15.50 D）。术后3个月裸眼视力≥ 20/25者占95.65%。91.3%的眼术后屈光度在正视眼+/- 0.50 D内，所有眼均在+/- 1.00 D内。BSCVA无1眼下降，52.17%增加1行，13.04%增加2行。没有患者在主观问卷上报告显著眩光或夜视问题。结论采用Nidek NAVEX系统的小切削区高度非球面过渡区LASIK治疗高度近视是有效的、可预测的、相对安全的。
PURPOSE To evaluate the efficacy and predictability of laser in situ keratomileusis (LASIK) using the Nidek NAVEX system with a small ablation (optical, OZ) zone and a large aspheric transition zone (OATz). METHODS We report a prospective nonrandomized study of LASIK for high myopia using a small ablation in 23 eyes of 18 patients. The optical zone was between 3 and 3.8 mm and transition zone (TZ) was between 7 and 7.8 mm. Preoperative examination included best-spectacle corrected visual acuity (BSCVA), refraction, and corneal topography. All eyes were measured by the Nidek OPD-Scan and data were imported to FinalFit software. Aspheric profile (OATz) numbers 5 to 7 were used. BSCVA, uncorrected spectacle visual acuity (UCVA), refraction, and subjective evaluation of glare and night vision by questionnaire were recorded after surgery. RESULTS At baseline, mean spherical equivalent refraction was -7.03 +/- 2.39 D (range -5.50 to -15.50 D). Postoperative UCVA was better than 20/25 in 95.65% of eyes 3 months after LASIK. Postoperative refraction was within +/- 0.50 D of emmetropia in 91.3% of eyes and within +/- 1.00 D in all eyes. No eye lost lines of BSCVA; 52.17% of eyes gained 1 line and 13.04% of eyes gained 2 lines. No patient reported significant glare or night vision problems on subjective questionnaire. CONCLUSION LASIK with a small ablation (optical) zone and high aspheric transition zone using the Nidek NAVEX system was effective, predictable, and relatively safe for correction of high myopia.