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首页> 外文期刊>Journal of cataract and refractive surgery >Decentration and tilt of a single-piece aspheric intraocular lens compared with the lens position in young phakic eyes.
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Decentration and tilt of a single-piece aspheric intraocular lens compared with the lens position in young phakic eyes.

机译：单片非球面人工晶状体的偏心度和倾斜度与年轻晶状体眼中的晶状体位置相比。

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摘要

PURPOSE: To compare the tilt and decentration of a single-piece aspheric intraocular lens (IOL) and the position of the natural crystalline lens in young individuals. SETTING: Department of Ophthalmology, Knappschafts Hospital, Sulzbach, Germany. METHODS: This prospective noncomparative single-center study included volunteers younger than 40 years with no ocular abnormalities (crystalline lens group) and patients older than age 62 who had uneventful cataract surgery and Tecnis ZCB00 IOL implantation (IOL group). All eyes were examined with the OPD-Scan II; spherical aberration, vertical coma Z(3,-1), and horizontal coma Z(3,1) were analyzed with a 5.0 mm pupil. Lens tilt and decentration were studied with a new Purkinje meter. RESULTS: The crystalline lens group and IOL group comprised 20 subjects (40 eyes) each. Both groups showed compensation for corneal spherical aberration and neutralization of horizontal corneal coma. All lenses were tilted upward (mean 2.2 degrees, crystalline lens; 2.5 degrees, IOL) and to the temporal side (mean 3.1 degrees, crystalline lens; 2.6 degrees, IOL). The crystalline lenses were decentered downward (mean 0.16 mm) and to the temporal side (mean 0.07 mm). The IOL was displaced to the nasal side of the pupil (mean 0.06 mm) with almost no vertical mean decentration (0.02 mm upward). CONCLUSIONS: The aspheric IOL and young crystalline lens compensated for mean corneal spherical aberration, resulting in low total spherical aberration. The position of the IOLs showed minimal decentration and tilt and was mirror symmetrical, comparable to the position of the crystalline lens in young individuals. The slight malpositioning partially compensated for corneal horizontal coma.
机译：目的：比较单件非球面人工晶状体（IOL）的倾斜度和偏心度以及年轻人中自然晶状体的位置。地点：德国苏尔茨巴赫Knappschafts医院眼科。方法：这项前瞻性非比较性单中心研究纳入了40岁以下，没有眼部异常的志愿者（晶状体组）和62岁以上的白内障摘除手术和Tecnis ZCB00 IOL植入患者（IOL组）。用OPD-Scan II检查所有眼睛;球差，垂直彗差Z（3，-1）和水平彗差Z（3,1）的瞳孔为5.0 mm。使用新的Purkinje仪表对镜头倾斜和偏心进行了研究。结果：晶状体组和IOL组各包括20名受试者（40只眼睛）。两组均显示角膜球差和水平角膜昏迷的中和补偿。所有镜片均向上倾斜（平均2.2度，晶状体; 2.5度，IOL），并向颞侧倾斜（平均3.1度，晶状体; 2.6度，IOL）。晶状体向下偏心（平均0.16 mm），向颞侧偏心（平均0.07 mm）。 IOL移到瞳孔的鼻侧（平均0.06 mm），几乎没有垂直平均偏心（向上0.02 mm）。结论：非球面人工晶状体和年轻的晶状体可以补偿平均角膜球差，从而降低总球差。 IOL的位置显示出最小的偏心和倾斜并且是镜面对称的，与年轻个体中晶状体的位置相当。轻微的错位可部分补偿角膜水平昏迷。

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