中国实用眼科杂志
中國實用眼科雜誌
중국실용안과잡지
CHINESE JOURNAL OF PRACTICAL OPHTHALMOLOGY
2008年
6期
569-572
,共4页
视力%对比度%波前像差
視力%對比度%波前像差
시력%대비도%파전상차
Visual acuity%Contrast sensitivity%Aberration
目的 分析超常视力眼波前像差与不同对比度视力的相关关系,探讨与视力相关的像差函数.方法 应用Snellcn视力表检测裸眼视力≥1.5者81例(81只眼),用WASCA波阵面像差仪测眼波前像差,用多功能电子视力测量仪测量、暗环境下对比度分别为100%、25%、10%和5%的视力.用多元线性相关与回归分析波前像差与不同对比度视力的相关关系.结果 总像差、各阶像差及各Zemike函数与亮、暗环境中对比度为100%和25%视力间的直线相关关系均无统计学意义(P＞0.05).总像差、2阶像差及离焦像差与亮、暗环境中对比度为10%和5%视力间直线相关关系均有统计学意义(P＜0.01)相关系数分别为-0.30、-0.35和-0.28、-0.35:-0.33、-0.38和-0.28、-0.39;-0.31、-0.39和-0.28、-0.39(P＜0.01).其余像差与对比度为10%利5%视力间直线相关关系均无统计学意义(P＞0.05).结论 超常视力眼波前像差与高对比度视力无直线相关关系,与低对比度视力有直线相关关系,总像差、2阶像差和离焦像差越小,低对比度视力越好.
目的 分析超常視力眼波前像差與不同對比度視力的相關關繫,探討與視力相關的像差函數.方法 應用Snellcn視力錶檢測裸眼視力≥1.5者81例(81隻眼),用WASCA波陣麵像差儀測眼波前像差,用多功能電子視力測量儀測量、暗環境下對比度分彆為100%、25%、10%和5%的視力.用多元線性相關與迴歸分析波前像差與不同對比度視力的相關關繫.結果 總像差、各階像差及各Zemike函數與亮、暗環境中對比度為100%和25%視力間的直線相關關繫均無統計學意義(P＞0.05).總像差、2階像差及離焦像差與亮、暗環境中對比度為10%和5%視力間直線相關關繫均有統計學意義(P＜0.01)相關繫數分彆為-0.30、-0.35和-0.28、-0.35:-0.33、-0.38和-0.28、-0.39;-0.31、-0.39和-0.28、-0.39(P＜0.01).其餘像差與對比度為10%利5%視力間直線相關關繫均無統計學意義(P＞0.05).結論 超常視力眼波前像差與高對比度視力無直線相關關繫,與低對比度視力有直線相關關繫,總像差、2階像差和離焦像差越小,低對比度視力越好.
목적 분석초상시력안파전상차여불동대비도시력적상관관계,탐토여시력상관적상차함수.방법 응용Snellcn시력표검측라안시력≥1.5자81례(81지안),용WASCA파진면상차의측안파전상차,용다공능전자시력측량의측량、암배경하대비도분별위100%、25%、10%화5%적시력.용다원선성상관여회귀분석파전상차여불동대비도시력적상관관계.결과 총상차、각계상차급각Zemike함수여량、암배경중대비도위100%화25%시력간적직선상관관계균무통계학의의(P＞0.05).총상차、2계상차급리초상차여량、암배경중대비도위10%화5%시력간직선상관관계균유통계학의의(P＜0.01)상관계수분별위-0.30、-0.35화-0.28、-0.35:-0.33、-0.38화-0.28、-0.39;-0.31、-0.39화-0.28、-0.39(P＜0.01).기여상차여대비도위10%리5%시력간직선상관관계균무통계학의의(P＞0.05).결론 초상시력안파전상차여고대비도시력무직선상관관계,여저대비도시력유직선상관관계,총상차、2계상차화리초상차월소,저대비도시력월호.
Objective To investigate the relation between ocular wavefront aberration and visualacuity at different contrast level in natural super visual acuity eyes.Methods 81 eyes of 81people with uncorrected visual acuity≥1.5 using Snellen visual acuity Chart were enrolled in thisstudy.Ocular aberration was measured using a Hartmann-Shack wavefront analyzer.Visual acuityat 100%,25%,and10%,and 5%contrast level under mesopic and scotopic condition was measuredusing a computer generated muti-function-visual-acuity analyzer.Linear correlation was used to analyze the relation between ocular wavefront aberration and visual acuity at different contrastlevel.Resuls Linear correlation;analysis revealed that the total aberration root-mean-square(RMS),the 2-7 order RMS,and each Zernike coefficient was not significantly correlated withvisual acuity at 100%,25%contrast level under mesopic and scotopic condition(P＞0.05).Thetotal RMS,the 2nd order RMS,and tile delbcus coefficient was significantly correlated withvisual acuity at 10%,5%contrast level under mesopic and scotopic condition(P＜0.01),and thecorrelation coefficient was-0.30,-0.35 and-0.28,-0.35:-0.33,-0.38 and-0.28,-0.39:-0.31,-0.3 and-0.28,-0.:39 respectively.The 3-7 order RMS,and the other Zernikecoefficient except defocus was not significantly correlated with visual acuity at 10%,5%contrastlevel under mcsopic and scotopic condition(P＞0.05).Conclusions In natural surer visual acuityeyes,the ocular wavefront aberrations were not significantly correlated with visual acuity athigh contrast level,but were significantly correlated with visual acuity at low contrast levels.Thetotal aberration RMS,2rd order RMS,and defocus coefficient were more lower,the visual acuityat low contrast level were more better.
