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AcrySof®ReSTOR®人工晶体与阶梯渐进式衍射光学爱尔康(中国)眼科产品有限公司手术产品部AcrySof®ReSTOR®人工晶体新闻发布:美国食品药品管理局已批准其产品AcrySof®ReSTOR®应用与伴有或不伴有老视的白内障患者BUSINESSWIRE,March23,200505年3月FDA批准ReSTOR®晶体进入老视和非老视的白内障市场,并已获得SFDA的批准进入中国市场焦点与人工晶体单焦---光线通过折射到达特定的焦点(如传统单焦人工晶体)Refractslighttoasinglespecificfocalpoint(i.e.traditionalmonofocalIOLs)多焦—将两个或以上独立的折射晶体集中在一起,得到多个焦点Multifocal–putstwoormoreindependentrefractivelensesintoonetomakemultiplefocalpoints晶体光线光线AcrySof®ReSTOR®人工晶体简介产品名称:无菌紫外线吸收性丙烯酸酯可折叠一片式渐进衍射型后房人工晶体ReSTOR人工晶体中文名称:瑞亮适用于伴有或不伴有老视的白内障患者可用于年龄在21岁以上的患者患者可同时获得远近视力,来自国外的临床数据显示:普通人工晶体术后80%的患者需要戴眼镜,而植入瑞亮晶体的患者只有5%需要戴眼镜主要参数:屈光指数:1.55A–常数:118.1度数范围:16~25D,0.5D递增传统的多焦人工晶体:•区带折射型多焦人工晶体•全光学面衍射型人工晶体ReSTOR®阶梯渐进衍射型人工晶体光学改进对临床效果的影响多焦晶体的种类dndnn=near代表产品IOLABNuVue代表产品StorzTrueVista区带型和衍射型晶体的演变d=distance代表产品AMOArraydndndnd两区带三区带五区带d衍射型(28个衍射区带)代表产品:3MorPharmacia(Pfizer)811E光线通过每个区带都同时向远、近焦点聚焦在中央区域光线同时向远、近焦点聚集,当瞳孔较大时光能逐渐混合阶梯渐进式衍射型(12个衍射区带)代表产品:AlconAcrySofReSTOR区带折射型衍射型阶梯渐进式衍射型这些图片是由接受Array®人工晶体植入的患者挑选出来的,代表着夜间他们眼中的光线形态(Hunkeleretal,J.Cat.Refr.Surg.28:1195-1204(2002)).AMOARRAY®植入术后患者的主诉传统多焦晶体的常见问题----夜视力图像对比ComparativeNighttimeImages*单焦Monofocal渐进衍射ApodizedDiffractive带状折射多焦ZonalRefractiveMultifocal*5mmAperture,IOLinWetCell00.511.522.53Small-scaleSimulationofWavefrontFocusingbyZonalRefractiveMultifocalLens小规模区带折射型多焦透镜波前聚焦模拟图带状折射与衍射人工晶体ZonalandDiffractiveIOLsdndnLightenergyequallysharedoverbroadrangeofpupils/lightingconditions,contributestohalosatnightLightenergyequallysharedforbrighttomoderatelighting/pupils–apodizationgraduallyincreasesdistanceenergywithlargerpupils-reduceshalosatnightZonalRefractive(5Zones)–AMOArrayFullOpticDiffractive–3M/Pfizer811EApodizedDiffractive-Alcond00.10.20.30.40.50.60.70.80.9112345PupilDiameter(mm)RelativeEnergy00.10.20.30.40.50.60.70.80.9112345PupilDiameter(mm)RelativeEnergyLightenergydramaticallyvarieswithnumberofzonesexposedbypupil,contributestohalosatnight0.10.20.30.40.50.60.70.80.91123456PupilDiameter(mm)DistanceFocusNearFocusRelativeEnergyAssessingIOLPerformance评估人工晶体的性能表现MTF-ModulationTransferFunction调制传递函数(MTF)•TheMTFdescribesthelossincontrastintheimageofasinusoidalpatternMTF描述了正弦图像对比敏感度的丢失•TheMTFdependsuponspatialfrequencyMTF与空间频率有关Lens00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrastTheMTFImagecontrast,andMTF,decreaseasthe“spatialfrequency”increases,evenforaperfectlensPointobjectPointimageisspreadoutAssessingIOLPerformance人工晶体的性能评估LightSpreadingatCircularApertures光线通过圆形小孔发生散射Clearaperture(AiryPattern)0.5radiusobstruction(orredirectiontootherfocus)0.8radiusobstruction(orredirectiontootherfocus)MTF(ImageContrast)00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrast00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrast00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrastfocusingregionoflensaperturePointimage6/6or20/20vision6/6or20/20vision6/6or20/20visionClearaperture(AiryPattern)0.5radiusobstruction(orredirectiontootherfocus)0.8radiusobstruction(orredirectiontootherfocus)MTF(ImageContrast)00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrast00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrast00.20.40.60.810100200300400SpatialFrequency(lp/mm)MTFContrastfocusingregionoflensaperturePointimage20/2020/2020/20ThisisthecontrastoftheimageontheretinabuttheretinadoesnotrespondtoanycontrastbelowthegreenlineAssessingIOLPerformance人工晶体的性能评估LightSpreadingatCircularApertures光线通过圆形小孔发生散射00.511.522.53Small-scaleSimulationofWavefrontFocusingbyZonalRefractiveMultifocalLens小规模区带折射型多焦透镜波前聚焦模拟图“阶梯渐进式”衍射型光学面“阶梯渐进式”衍射结构与周边折射区相融合随着瞳孔增大,光能分布逐渐偏重于远距离视觉瞳孔较大时更多的光线投向远焦点,能够将夜间视觉干扰减至最小ReSTOR®的阶梯渐进设计提高了近距离成像的质量3.6mm1.5mm1.3微米0.75mm阶梯渐进式衍射型光学面•光学面中央直径为3.6毫米的区域为衍射结构•阶梯高度由中央的1.3微米渐降至周边的0.2微米,阶梯宽度也以同样规律递减•在晶状体平面加入+4.0D的近附加度数,相当于镜片平面的+3.2D阶梯渐进透镜从中央至边缘逐渐变化的光学特性“阶梯渐进”在显微镜和天文望远镜中用于提高像质ReSTOR的“阶梯渐进式”衍射设计既能控制像质,又能控制光能平衡fromNikonwebsiteAcrySof®ReSTOR®人工晶体的制造工艺参数与人体结构的比较AcrySof®ReSTOR®人工晶体周边最小阶梯的高度为0.2微米人体毛发的直径为60微米红细胞直径为7微米ReSTOR®阶梯渐进式衍射型人工晶体光学面包含衍射和折射部分,并应用“阶梯渐进式”衍射技术根据活动情况和光照条件进行合适的光能分配通过特定的光学设计减少视觉干扰通过人工晶体平面上4D的近附加度数区分物像附加度数人工晶体平面+4.0D的附加度数等价于镜片平面+3.2D的附加度数在31cm处近视力最佳区分远、近物像,尽量增大图像对比度并减少视觉干扰2.早期病例主观排除标准非常挑剔者对术后效果有不切实际的期望者想佩戴眼镜者职业夜间驾驶员医学排除标准角膜散光度数1.0D者?术前合并其他眼部疾患者?既往曾接受屈光手术者?已有一只眼接受单焦人工晶体植入者?模拟的日光下视远状况模拟的日光下视近状况模拟的夜光下视远状况变焦中的双眼平均视力,随访120-180天-0.100.10.20.30.40.50.60.70.80.9121.510.50-0.5-1-1.5-2-2.5-3-3.5-4-4.5-5ReSTOR,N=34Control,N=27视力的平均对数分值20/1620/2020/2520/3220/4020/5020/6020/8020/10020/12520/16020/200远距离近距离中距离有功能视觉范围4.5D景深6DBinocularDefocusCurve-AFullRangeofVision®ReSTOR®植入术后患者无需戴镜率术后6月双眼情况80881893620102030405060708090100OverallNearDistanceReSTOR®ControlN=339N=156N=336N=156N=336N=156ReSTOR®IOLtreatmentgroupsreportedsignificantly(p0.0001)higherratesoffreedomfromspectaclewear.病人百分比9%4%87%VisualDisturbances120-180DaysPost-Operative76%5%19%4%2%94%2%97%1%7%2%91%NightVisionProblemsHalosGlareAcrySof®ReSTOR®IOLN=457MonofocalControlN=156None/MildModerateSevere21%5%74%Q&A谢谢!
本文标题:人工晶体与阶梯渐进式衍射光学
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