Topography-driven excimer laser for the retreatment of decentralized myopic photorefractive keratectomy
Topography-driven excimer laser for the retreatment of decentralized myopic photorefractive keratectomy
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DOI：
10.1016/s0161-6420(01)00706-0
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发表时间：
2001-09-01
期刊：
影响因子：
13.7
通讯作者：
Sborgia, C
中科院分区：
文献类型：
--
作者：
Alessio, G;Boscia, F;Sborgia, C
目的：本研究评估了软件程序的有效性、可预测性、稳定性和安全性（Corneal Interactive Programmed Topographic Ablation，CIPTA，LIGI，塔兰托，意大利），通过将角膜地形图的程序化消融转移到飞点准分子激光，提供定制的激光消融用于矫正近视后屈光性角膜切除术（PRK）偏心。设计：非比较性连续病例系列。参与者：平均年龄为35岁（范围，19-49岁;标准差[SD]，7.9）的32例受试者的32只眼在巴里大学（意大利）的Clinica Oculistica接受了CIPTA引导的眼科手术。所有受试者在近视后矫正后都具有不规则散光，因为临床上显著的偏心治疗超过1 mm。操作：通过角膜地形图仪（Orbscan 11，Orbtek，Inc.，湖城，UT）。这些，连同折射数据，进行处理，以获得一个定制的高度烧蚀轮廓，被转移到飞点激光（Laserscan 2000，Lasersight，Orlando，FL）。主要结果测量：分析中心定位的地形研究和未矫正（UCVA）和最佳矫正（BCVA）视力、可预测性和屈光稳定性以及任何并发症的数据。平均随访时间为10.3个月（范围：4-18个月; SD，5.8）。在最后一次术后检查时，29只眼（90.6%）的UCVA上级超过20/40。19只眼（59.4%）的UCVA为20/20。22只眼（68.75%）的等效球镜矫正度在0.50 D以内，28只眼（87.5%）在1 D以内。矫正成功指数为0.15。无1眼BCVA的Snellen线丢失，18眼（56.25%）Snellen线增加。术后地形显示良好的集中treatment.Conclusions：地形数据与计算机控制的飞点准分子激光消融术相结合是一个合适的解决方案，用于纠正后近视PRIK decentrations不规则散光。
Objective: This study evaluated the efficacy, predictability, stability, and safety of a software program (Corneal Interactive Programmed Topographic Ablation, CIPTA, LIGI, Taranto, Italy), which, by transferring programmed ablation from the corneal topograph to a flying-spot excimer laser, provides customized laser ablation for correction of postmyopic photorefractive keratectomy (PRK) decentrations.Design: Noncomparative consecutive case series.Participants: Thirty-two eyes of 32 subjects with a mean age of 35 years (range, 19-49; standard deviation [SD], 7.9) had CIPTA-guided PRK at the Clinica Oculistica of Bari University (Italy). All the subjects had irregular astigmatism after postmyopic PRK because of clinically significant, decentered treatments of more than 1 mm.Operation: Individual topographies were acquired by a corneal topograph (Orbscan 11, Orbtek, Inc., Salt Lake City, UT). These, together with refractive data, were processed to obtain a customized altimetric ablation profile that was transferred to a flying-spot laser (Laserscan 2000, Lasersight, Orlando, FL).Main Outcome Measures: The topographic study of centration and data on uncorrected (UCVA) and best-corrected (BCVA) visual acuity, predictability, and stability of refraction, and any complications, were analyzed.Results: Mean follow-up was 10.3 months (range, 4-18 months; SD, 5.8). At the last postoperative examination, 29 eyes (90.6%) had a UCVA superior to 20/40. Nineteen eyes (59.4%) had a UCVA of 20/20. Twenty-two eyes (68.75%) were within 0.50 diopters (D) of attempted correction in the spherical equivalent and 28 eyes (87.5%) were within 1 D. The index of success of astigmatic correction was 0.15. No eye lost Snellen lines of BCVA, whereas 18 eyes (56.25%) gained Snellen lines. Postoperative topographies revealed well-centered treatments.Conclusions: The combination of topographic data with computer controlled flying-spot excimer laser ablation is a suitable solution for correcting irregular astigmatism after postmyopic PRIK decentrations.