兒童遠視合并弱視眼的高階像差與視覺質(zhì)量的關(guān)系

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1、兒童遠視合并弱視眼的高階像差與視覺質(zhì)量的關(guān)系【摘要】　　目的：探索兒童遠視弱視眼的高階像差與屈光度及對比敏感度的關(guān)系。方法：66例遠視弱視患兒經(jīng)10g/L阿托品散瞳7d后進行檢影并使用Allegretto波前像差儀進行像差測定；20d待瞳孔完全恢復(fù)后在完全矯正屈光不正情況下用CSV1000對比敏感度燈測試其暗室對比敏感度。結(jié)果：帶狀檢影球鏡度為+2.60±1.76D，柱鏡度為+1.15±0.98D，散光軸為82.83±27.93。而波前像差測得的值分別為+2.76±1.69D，+1.35±1.02D，85.37±30.72D。隨著球鏡值增大，各階像差值亦增大。中、低度弱視組兩兩比較，

2、RMS1,RMS5，RMSh差異有顯著性(P<0.01),中低度遠視組兩兩比較RMS2，RMSg及C12差異有顯著性(P<0.01)。弱視患兒全頻段對比敏感度均下降，尤其高頻區(qū)下降顯著，高階像差中C8及C12與高頻段對比敏感度有相關(guān)性。結(jié)論：波前像差檢查及對比敏感度檢查均能較正確，全面地反映弱視兒童眼的屈光度及視覺質(zhì)量，可作為遠視、弱視兒童屈光檢查的一種客觀手段。有助于了解兒童弱視的原因及追蹤觀察其治療的轉(zhuǎn)歸?！娟P(guān)鍵詞】遠視；弱視；波前像差；對比敏感度；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　　作為一種重要的光學系