儿童远视合并弱视眼的高阶像差与视觉质量的关系

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1、儿童远视合并弱视眼的高阶像差与视觉质量的关系【摘要】　　目的：探索儿童远视弱视眼的高阶像差与屈光度及对比敏感度的关系。方法：66例远视弱视患儿经10g/L阿托品散瞳7d后进行检影并使用Allegretto波前像差仪进行像差测定；20d待瞳孔完全恢复后在完全矫正屈光不正情况下用CSV1000对比敏感度灯测试其暗室对比敏感度。结果：带状检影球镜度为+2.60±1.76D，柱镜度为+1.15±0.98D，散光轴为82.83±27.93。而波前像差测得的值分别为+2.76±1.69D，+1.35±1.02D，85.37±30.72D。随着球镜值增大，各阶像差值亦增大。中、低度弱视组两两比较，

2、RMS1,RMS5，RMSh差异有显著性(P<0.01),中低度远视组两两比较RMS2，RMSg及C12差异有显著性(P<0.01)。弱视患儿全频段对比敏感度均下降，尤其高频区下降显著，高阶像差中C8及C12与高频段对比敏感度有相关性。结论：波前像差检查及对比敏感度检查均能较正确，全面地反映弱视儿童眼的屈光度及视觉质量，可作为远视、弱视儿童屈光检查的一种客观手段。有助于了解儿童弱视的原因及追踪观察其治疗的转归。【关键词】远视；弱视；波前像差；对比敏感度；屈光　　AbstractAIM:Toinvestigatetherelationshipbetweenthehigher

3、orderaberrationsandthediopteraswellascontrastsensitivityinchildrenwithhyperopicamblyopia.METHODS:Sixty18sixcasesofchildrenwithhyperopicamblyopiaweredilatedthepupilswithatropineforsevendaysandaretinoscopywasexecutedforeveryone.Thewavefrontanalyzerwasalsousedinthestudy;Whenthepupilsregainedthenor

4、maldiameter20dayslater,thecontrastsensitivitywasmeasuredbytheCSV1000inadarkroom.RESULTS:Themeanrefractivestatesofthechildrenwere+2.60±1.76D(hyperopicdiopter)and+1.15±0.98D(astigmaticdiopter)withanaxisof82.83±27.93bybarredretinoscopy.Whilerecordedbythewavefrontaberrationstheywere+2.76±1.69Dand+1

5、.35±1.02Drespectivelywithanaxisof85.37±30.72D.Withtheincreaseofthehyperopicdiopter,theaberrationsatalllevelsincreased.ThedifferencesofRMS1,RMS5andRMShinthemiddleandlowamblyopicgroupwasassignificantasthedifferencesofRMS2,RMSgandC12inthemiddleandlowhyperopicgroup(P<0.01).Thecontrastsensitivityo

6、fthechildrendecreasedatallfrequencies,especiallyathighfrequency.TheC8andC12athigherorderaberrationshadsignificantcorrelationwiththecontrastsensitivityathigherfrequency.CONCLUSION:Thewavefrontaberrationsandcontrastsensitivitycancorrectlyevaluaterefractivedegreeandvisualqualityinchildrenwithhypero

7、piaandcouldbeusedasanobjectivemeasure.Atthesametime,theyareusefulin18investigatingthecauseofamblyopiaandeffectofthetherapy.　　　　KEYWORDS:hyperopia;amblyopia;wavefrontaberration;contrastsensitivity;refraction　　0引言　　作为一种重要的光学系