Objective: To evaluate the effectiveness, predictability and city of laser in situ keratomileusis (LASIK) for correction of hyperopia. Methods 54 eyes of 35 patients with hyperopia ranging from+1.00 to + 6. 00 diopter...Objective: To evaluate the effectiveness, predictability and city of laser in situ keratomileusis (LASIK) for correction of hyperopia. Methods 54 eyes of 35 patients with hyperopia ranging from+1.00 to + 6. 00 diopter(D) received a one-pass, multizone scanning excimer laser ablations using the Chiron Technolas Keracor 11 7C excimer laser and System ALK automated corneal shaper H-230.Data on uncorrected and hot corrected visual acuity, predictability, stability of refraction, and complications were analyzed. The average follow-up was 12 months. Results At 12 months, the average residual refraction was(+ 0. 29 ±0. 78)D. 45 eyes (83.3% ) were in the range of ±1. OD and 33 eyes(61. 1% ) were within the range of ± 0. 5D. 50 eyes (92. 6% ) had uncorrected visual acuity of 20/40 or better and 34 eyes (63. 0% ) had 20/20 or better. 1 eyes (1. 9% ) lost 2 line of the best-corrected visual acuity and 2 eyes (3. 7% ) gained 2 lines or more. 2 eyes (3. 7%) had complaint of halos and 1 eyes (1. 9% ) had glare at 12 months. Conclusion LASIK can he used to treat hyperopia from + 1. 0D to + 6. 0D with good predictability and city. Primary and second hyperopia should he treated with different nomogram. some modification of the surgical algorithms and laser nomogram will help to improve predictability and stability of outcome.展开更多
We report on the impact of direct ultraviolet germicidal irradiation（UVGI）on reflective optics,used in the excimer laser system Allegretto Eye-Q.The aim of our work was to confirm our hypothesis based on long-rate o...We report on the impact of direct ultraviolet germicidal irradiation（UVGI）on reflective optics,used in the excimer laser system Allegretto Eye-Q.The aim of our work was to confirm our hypothesis based on long-rate observations of obtained anomalies in post-operative results that are attributed to degradation of reflective optics upon ultraviolet radiation.The presence of direct UVGI coupled with humidity in the operating environment caused merging anomalies and unwanted post-operative correction values.Ultraviolet-A radiation caused a similar effect on the reflective cover of the mirrors.展开更多
Background Children with anisometropic amblyopia are often noncompliant with traditional treatment including spectacules and contact lenses. This study was to evaluate the long-term efficacy of excimer laser in situ k...Background Children with anisometropic amblyopia are often noncompliant with traditional treatment including spectacules and contact lenses. This study was to evaluate the long-term efficacy of excimer laser in situ keratomileusis （LASIK） for children with high anisometropic amblyopia. Methods A retrospective analysis of 24 children with high unilateral anisometropic amblyopia, who underwent LASIK during the period between August 2000 and September 2005 in our hospital, was conducted. The mean age of these children was （7.4±1.9） years （range 5-14 years） and the mean follow-up period was （33.3±14.2） months （range 18.5-74.2 months）. After LASIK, visual acuity, refraction and far or near stereoacuity were analyzed. Near stereoacuity was measured by the random-dot butterfly stereogram and the pre-school random-dot stereogram, while far stereoacuity was measured by the synoptophore with Yan＇s random-dot stereogram. Results Mean preoperative uncorrected visual acuity was 0.06±0.05, while mean postoperative uncorrected visual acuity was elevated to 0.43±0.33. Mean preoperative best-corrected visual acuity was 0.26±0.22, while mean postoperative best-corrected visual acuity was elevated to 0.67±0.40. For patients with myopic anisometropia, preoperative mean spherical equivalent refraction was （-8.01±2.70） D while postoperative value significantly reduced to （-1.32±2.47） D. For patients with hyperopic anisometropia, preoperative mean spherical equivalent refraction was （ 7.35±1.55） D while postoperative value significantly reduced to （3.30±0.86） D. These results demonstrated that there was statistical difference in these parameters between preoperative and postoperative tests. At the last follow-up, 20 patients had near stereoacuity, and the mean near stereoacuities measured by the random-dot butterfly stereogram and the preschool random-dot stereogram were （149.00±152.93）＂ and （201.05±235.94）＂, respectively. In contrast, 11 patients had far stereoacuity, and the mean far stereoacuity measured by the synoptophore was （210.91±217.51）. Three cases of patients developed mild corneal complications. Conclusion LASIK for the correction of high anisometropia in children with monocular amblyopia may be safe and effective, and this can help effectively conduct postoperative amblyopia training and improve the cure rate.展开更多
目的观察虹膜定位联合波前像差引导的准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)术中眼球旋转的特点与规律。方法选择行虹膜定位联合波前像差引导的LASIK的近视患者560例(1117眼),其中,右眼558眼,左眼559眼。采用Zy...目的观察虹膜定位联合波前像差引导的准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)术中眼球旋转的特点与规律。方法选择行虹膜定位联合波前像差引导的LASIK的近视患者560例(1117眼),其中,右眼558眼,左眼559眼。采用Zywave波前像差仪(美国博士伦公司)采集患眼在暗室瞳孔自然散大状态下及明光小瞳孔时的虹膜数据及波前像差数据,通过网络传输,在切削角膜瓣后掀开角膜瓣前,启动虹膜定位功能,记录眼球旋转类型和度数(系统默认顺时针旋转角度为正值,逆时针旋转角度为负值)。结果双眼的外旋发生率明显大于内旋,差异均有统计学意义(均为P=0.000),右眼外旋377眼(占33.75%),左眼外旋373眼(占33.40%);双眼的旋转度:右眼-0.1°^-11.4°(平均-3.33°±2.28°),左眼0.1°~14.1°(平均3.03°±2.26°)。双眼内、外旋转度≤5.0°者共950眼(占85.05%),其中右眼内旋169眼,外旋304眼;左眼内旋170眼,外旋307眼。结论角膜行屈光手术时,从坐位的术前检查到仰卧位的屈光手术,眼球会发生内、外旋转,虹膜定位联合波前像差引导的LASIK,能将眼球内、外旋转进行准确定位。展开更多
文摘Objective: To evaluate the effectiveness, predictability and city of laser in situ keratomileusis (LASIK) for correction of hyperopia. Methods 54 eyes of 35 patients with hyperopia ranging from+1.00 to + 6. 00 diopter(D) received a one-pass, multizone scanning excimer laser ablations using the Chiron Technolas Keracor 11 7C excimer laser and System ALK automated corneal shaper H-230.Data on uncorrected and hot corrected visual acuity, predictability, stability of refraction, and complications were analyzed. The average follow-up was 12 months. Results At 12 months, the average residual refraction was(+ 0. 29 ±0. 78)D. 45 eyes (83.3% ) were in the range of ±1. OD and 33 eyes(61. 1% ) were within the range of ± 0. 5D. 50 eyes (92. 6% ) had uncorrected visual acuity of 20/40 or better and 34 eyes (63. 0% ) had 20/20 or better. 1 eyes (1. 9% ) lost 2 line of the best-corrected visual acuity and 2 eyes (3. 7% ) gained 2 lines or more. 2 eyes (3. 7%) had complaint of halos and 1 eyes (1. 9% ) had glare at 12 months. Conclusion LASIK can he used to treat hyperopia from + 1. 0D to + 6. 0D with good predictability and city. Primary and second hyperopia should he treated with different nomogram. some modification of the surgical algorithms and laser nomogram will help to improve predictability and stability of outcome.
文摘We report on the impact of direct ultraviolet germicidal irradiation（UVGI）on reflective optics,used in the excimer laser system Allegretto Eye-Q.The aim of our work was to confirm our hypothesis based on long-rate observations of obtained anomalies in post-operative results that are attributed to degradation of reflective optics upon ultraviolet radiation.The presence of direct UVGI coupled with humidity in the operating environment caused merging anomalies and unwanted post-operative correction values.Ultraviolet-A radiation caused a similar effect on the reflective cover of the mirrors.
文摘Background Children with anisometropic amblyopia are often noncompliant with traditional treatment including spectacules and contact lenses. This study was to evaluate the long-term efficacy of excimer laser in situ keratomileusis （LASIK） for children with high anisometropic amblyopia. Methods A retrospective analysis of 24 children with high unilateral anisometropic amblyopia, who underwent LASIK during the period between August 2000 and September 2005 in our hospital, was conducted. The mean age of these children was （7.4±1.9） years （range 5-14 years） and the mean follow-up period was （33.3±14.2） months （range 18.5-74.2 months）. After LASIK, visual acuity, refraction and far or near stereoacuity were analyzed. Near stereoacuity was measured by the random-dot butterfly stereogram and the pre-school random-dot stereogram, while far stereoacuity was measured by the synoptophore with Yan＇s random-dot stereogram. Results Mean preoperative uncorrected visual acuity was 0.06±0.05, while mean postoperative uncorrected visual acuity was elevated to 0.43±0.33. Mean preoperative best-corrected visual acuity was 0.26±0.22, while mean postoperative best-corrected visual acuity was elevated to 0.67±0.40. For patients with myopic anisometropia, preoperative mean spherical equivalent refraction was （-8.01±2.70） D while postoperative value significantly reduced to （-1.32±2.47） D. For patients with hyperopic anisometropia, preoperative mean spherical equivalent refraction was （ 7.35±1.55） D while postoperative value significantly reduced to （3.30±0.86） D. These results demonstrated that there was statistical difference in these parameters between preoperative and postoperative tests. At the last follow-up, 20 patients had near stereoacuity, and the mean near stereoacuities measured by the random-dot butterfly stereogram and the preschool random-dot stereogram were （149.00±152.93）＂ and （201.05±235.94）＂, respectively. In contrast, 11 patients had far stereoacuity, and the mean far stereoacuity measured by the synoptophore was （210.91±217.51）. Three cases of patients developed mild corneal complications. Conclusion LASIK for the correction of high anisometropia in children with monocular amblyopia may be safe and effective, and this can help effectively conduct postoperative amblyopia training and improve the cure rate.
文摘目的观察虹膜定位联合波前像差引导的准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)术中眼球旋转的特点与规律。方法选择行虹膜定位联合波前像差引导的LASIK的近视患者560例(1117眼),其中,右眼558眼,左眼559眼。采用Zywave波前像差仪(美国博士伦公司)采集患眼在暗室瞳孔自然散大状态下及明光小瞳孔时的虹膜数据及波前像差数据,通过网络传输,在切削角膜瓣后掀开角膜瓣前,启动虹膜定位功能,记录眼球旋转类型和度数(系统默认顺时针旋转角度为正值,逆时针旋转角度为负值)。结果双眼的外旋发生率明显大于内旋,差异均有统计学意义(均为P=0.000),右眼外旋377眼(占33.75%),左眼外旋373眼(占33.40%);双眼的旋转度:右眼-0.1°^-11.4°(平均-3.33°±2.28°),左眼0.1°~14.1°(平均3.03°±2.26°)。双眼内、外旋转度≤5.0°者共950眼(占85.05%),其中右眼内旋169眼,外旋304眼;左眼内旋170眼,外旋307眼。结论角膜行屈光手术时,从坐位的术前检查到仰卧位的屈光手术,眼球会发生内、外旋转,虹膜定位联合波前像差引导的LASIK,能将眼球内、外旋转进行准确定位。
