简介：目的：测量白内障患者眼球生物学参数及构成比。方法：广东茂名1097例患者术前均检测眼压、眼轴、角膜曲率、角膜曲率半径、前房深度、晶状体厚度、玻璃体腔深度和记录晶状体混浊情况，应用SPSS15．0统计学软件进行统计分析。结果：白内障患者主要由60岁以上老人组成（90．88％），随着年龄增长，前房深度逐渐减小，垂直方向的角膜曲率变小，垂直方向的角膜曲率半径则变大，而眼轴则无明显改变；女性垂直和水平角膜曲率均大于男性，相应的角膜曲率半径则均小于男性；女性跟轴较男性短；女性晶状体厚度较男性小；女性玻璃体腔深度也较男性小；左眼的前房深度较右眼大。结论：广东茂名白内障患者主要由60岁以上患者组成，眼球参数随性别、年龄及眼别不同发生变化。

简介：AIM:Todeterminethenormativevaluesofwhite-towhitecornealdiameterwithOrbscanIITopographySystemandtocomparerightandlefteyesdatainthenormalyoungpopulation.METHODS:Atotalof1001healthyparticipantsaged18-45yparticipatedinthisobservationalcross-sectionalstudy.Thestudypopulationconsistedof616femaleand385malesubjects.ThecornealdiameterwasmeasuredwiththeOrbscanII.Thedifferencesbetweengenders,betweenrightandlefteyesandage-relatedchangeswereevaluated.StatisticalanalyseswereperformedusingStudent’st-test.RESULTS:Theaveragewhite-to-whitedistanceinourstudypopulationwasrecordedas11.65±0.36mm(median:11.60mm,mode:11.70mm,minimum:10.50mmandmaximum:13.60mm).Thewhite-to-whitedistancewas11.60±0.35mminmalesand11.71±0.36mminfemaleswhichwasstatisticallydifferentbetweengenders(P<0.01).However,white-to-whitedistancewasnotstatisticallydifferentbetweenrightandlefteyes.Inaddition,thisparameterdecreasedwithincreasingage.Considering95%confidenceinterval,cornealdiameterlessthan10.93mmandgreaterthan12.34mmwouldbeconsideredasmicrocorneaandmegalocornea,respectivelybasedonthisstudypopulation,usingtheOrbscanIItopography.CONCLUSION:DetaileddescriptionandanalysisofcornealdiameterwithOrbscandemonstratethattheobtainedaveragevalueofhorizontalwhite-to-whiteishigherinmalethanfemaleanddecreasesslightlywithincreasingage.Ourdataalsosuggeststhecutoffvaluesfordefinitionofmicrocorneaandmegalocornea,whichcanbeemployedwiththispopulation.