中华实验眼科杂志
中華實驗眼科雜誌
중화실험안과잡지
CHINESE JOURNAL OF EXPERIMENTAL OPHTHALMOLOGY
2011年
11期
1028-1031
,共4页
冯超%陈长征%杨安怀%邢怡桥%易莲芳
馮超%陳長徵%楊安懷%邢怡橋%易蓮芳
풍초%진장정%양안부%형이교%역련방
扫描视觉诱发电位%小数视力%LogMAR视力
掃描視覺誘髮電位%小數視力%LogMAR視力
소묘시각유발전위%소수시력%LogMAR시력
Sweep visual evoked potential%Decimal visual acuity%LogMAR acuity
背景 扫描视觉诱发电位(SVEP)是一种客观视力的检测方法,虽然SVEP客观推断视力与主观视力之间存在着明显的相关性,但是两者之间并不完全吻合.研究显示,改进SVEP客观推断视力的推算方法可以提高推断视力的准确性.目的 研究SVEP客观推断视力两种推算方法,即振幅—空间频率(A-SP)回归方法与振幅—视角对数(A-logVA)回归方法在客观视力评估中的准确性,探讨影响SVEP客观推断视力准确性的因素.方法对64例具有不同视力的113眼进行SVEP检测、主观小数视力和LogMAR视力检测,分别计算A -SP回归方法推算出的小数视力和LogMAR视力及A-logVA回归方法推算出的小数视力和LogMAR视力,并对检测结果行相关性分析.使用重庆国特公司GT-2000n型视觉电生理仪检测SVEP,选用0.99 ～ 12.89 cpd的10个空间频率水平正弦光栅连续刺激视网膜,经离散傅里叶分析获得A-SP回归曲线和A-logVA回归曲线,并将相关直线外推至0振幅处,获得SVEP客观推断视力.结果 在小数视力评价系统中,A-SP回归方法和A-logVA回归方法推算出的回归线相关指数分别为0.663和0.705,主观小数视力与由A-SP回归方法推算所得的小数视力间呈正相关(r=0.620,P＜0.01),主观小数视力与由A-logVA回归方法推算所得的小数视力间呈正相关(r=0.540,P＜0.01).SP小数视力与VA小数视力间差异有统计学意义(Z=-8.688,P＜0.01)；在LogMAR视力评价系统中,A-SP回归方法和A-logVA回归方法推算出的回归线相关指数分别为0.733和0.715,主观LogMAR视力与由A-SP回归方法推算所得的LogMAR视力间呈正相关(r=0.710,P＜0.01),主观LogMAR视力与由A-logVA回归方法推算所得的LogMAR视力间呈正相关(r=0.700,P＜0.01).两种推算方法获得的LogMAR视力间差异有统计学意义(Z=-8.748,P＜0.01).不同性别、眼别、病种以及年龄段中VA LogMAR视力测试值的偏差差异均无统计学意义(x2=2.171,P=0.338;x2=0.976,P=0.614;x2 =6.032,P=0.420; x2=14.720,P=0.257).结论SVEP是检测客观视力较为有效的方法.但SVEP变异较大,就目前检测技术的稳定性与准确性而言,A-logVA回归方法推算出的客观视力较A-SP回归方法准确.
揹景 掃描視覺誘髮電位(SVEP)是一種客觀視力的檢測方法,雖然SVEP客觀推斷視力與主觀視力之間存在著明顯的相關性,但是兩者之間併不完全吻閤.研究顯示,改進SVEP客觀推斷視力的推算方法可以提高推斷視力的準確性.目的 研究SVEP客觀推斷視力兩種推算方法,即振幅—空間頻率(A-SP)迴歸方法與振幅—視角對數(A-logVA)迴歸方法在客觀視力評估中的準確性,探討影響SVEP客觀推斷視力準確性的因素.方法對64例具有不同視力的113眼進行SVEP檢測、主觀小數視力和LogMAR視力檢測,分彆計算A -SP迴歸方法推算齣的小數視力和LogMAR視力及A-logVA迴歸方法推算齣的小數視力和LogMAR視力,併對檢測結果行相關性分析.使用重慶國特公司GT-2000n型視覺電生理儀檢測SVEP,選用0.99 ～ 12.89 cpd的10箇空間頻率水平正絃光柵連續刺激視網膜,經離散傅裏葉分析穫得A-SP迴歸麯線和A-logVA迴歸麯線,併將相關直線外推至0振幅處,穫得SVEP客觀推斷視力.結果 在小數視力評價繫統中,A-SP迴歸方法和A-logVA迴歸方法推算齣的迴歸線相關指數分彆為0.663和0.705,主觀小數視力與由A-SP迴歸方法推算所得的小數視力間呈正相關(r=0.620,P＜0.01),主觀小數視力與由A-logVA迴歸方法推算所得的小數視力間呈正相關(r=0.540,P＜0.01).SP小數視力與VA小數視力間差異有統計學意義(Z=-8.688,P＜0.01)；在LogMAR視力評價繫統中,A-SP迴歸方法和A-logVA迴歸方法推算齣的迴歸線相關指數分彆為0.733和0.715,主觀LogMAR視力與由A-SP迴歸方法推算所得的LogMAR視力間呈正相關(r=0.710,P＜0.01),主觀LogMAR視力與由A-logVA迴歸方法推算所得的LogMAR視力間呈正相關(r=0.700,P＜0.01).兩種推算方法穫得的LogMAR視力間差異有統計學意義(Z=-8.748,P＜0.01).不同性彆、眼彆、病種以及年齡段中VA LogMAR視力測試值的偏差差異均無統計學意義(x2=2.171,P=0.338;x2=0.976,P=0.614;x2 =6.032,P=0.420; x2=14.720,P=0.257).結論SVEP是檢測客觀視力較為有效的方法.但SVEP變異較大,就目前檢測技術的穩定性與準確性而言,A-logVA迴歸方法推算齣的客觀視力較A-SP迴歸方法準確.
배경 소묘시각유발전위(SVEP)시일충객관시력적검측방법,수연SVEP객관추단시력여주관시력지간존재착명현적상관성,단시량자지간병불완전문합.연구현시,개진SVEP객관추단시력적추산방법가이제고추단시력적준학성.목적 연구SVEP객관추단시력량충추산방법,즉진폭—공간빈솔(A-SP)회귀방법여진폭—시각대수(A-logVA)회귀방법재객관시력평고중적준학성,탐토영향SVEP객관추단시력준학성적인소.방법대64례구유불동시력적113안진행SVEP검측、주관소수시력화LogMAR시력검측,분별계산A -SP회귀방법추산출적소수시력화LogMAR시력급A-logVA회귀방법추산출적소수시력화LogMAR시력,병대검측결과행상관성분석.사용중경국특공사GT-2000n형시각전생리의검측SVEP,선용0.99 ～ 12.89 cpd적10개공간빈솔수평정현광책련속자격시망막,경리산부리협분석획득A-SP회귀곡선화A-logVA회귀곡선,병장상관직선외추지0진폭처,획득SVEP객관추단시력.결과 재소수시력평개계통중,A-SP회귀방법화A-logVA회귀방법추산출적회귀선상관지수분별위0.663화0.705,주관소수시력여유A-SP회귀방법추산소득적소수시력간정정상관(r=0.620,P＜0.01),주관소수시력여유A-logVA회귀방법추산소득적소수시력간정정상관(r=0.540,P＜0.01).SP소수시력여VA소수시력간차이유통계학의의(Z=-8.688,P＜0.01)；재LogMAR시력평개계통중,A-SP회귀방법화A-logVA회귀방법추산출적회귀선상관지수분별위0.733화0.715,주관LogMAR시력여유A-SP회귀방법추산소득적LogMAR시력간정정상관(r=0.710,P＜0.01),주관LogMAR시력여유A-logVA회귀방법추산소득적LogMAR시력간정정상관(r=0.700,P＜0.01).량충추산방법획득적LogMAR시력간차이유통계학의의(Z=-8.748,P＜0.01).불동성별、안별、병충이급년령단중VA LogMAR시력측시치적편차차이균무통계학의의(x2=2.171,P=0.338;x2=0.976,P=0.614;x2 =6.032,P=0.420; x2=14.720,P=0.257).결론SVEP시검측객관시력교위유효적방법.단SVEP변이교대,취목전검측기술적은정성여준학성이언,A-logVA회귀방법추산출적객관시력교A-SP회귀방법준학.
Background Sweep pattern visual evoked potential (SVEP) is an objective method of visual test.There is a clear correlation between SVEP acuity and subjective vision,but they are not identical.Recent studies showed that new regression method can improve the accuracy of SVEP acuity. Objective This trial was to investigate and compare the outcome between amplitude-spatial frequency (A-SP) regression method and amplitudelogVA (A-logVA) regression method in extrapolating the SVEP acuity.Methods SVEP was recorded in 113 eyes of 64 subjects using GT-2000 ( Guo Te,China) with the gratings of 10 different spatial frequency from 0.99 to 12.89 cpd as stimulus.The 1 13 eyes included cataract,glaucoma,corneal disease,optical neuropathy,retinal disease,ocular trauma,refractive error and normal eyes.The correlation were analyzed of SVEP acuity,decimal visual acuity and LogMAR visual acuity.The response were averaged and DFT on the monitor display.SVEP acuity was calculated by extrapolating 0 response amplitude.Results The correlation indices of decimal visual acuity curves obtained by the A-logVA function was 0.663,and that obtained by the A-SP function was 0.705.The positive correlation was seen between subjective decimal visual acuity and A-logVA decimal visual acuity (r =0.540,P＜ 0.01 ) and between subjective decimal acuity and decimal acuity calculated by the A-SP regression method (r=0.620,P＜0.01 ).SVEP decimal acuity calculated by the A-SP function regression method was significantly different from the that calculated by the A-logVA function regression method (Z =-8.688,P＜0.01 ).And the correlation indices of LogMAR visual acuity curves obtained by the A-logVA function was 0.733 and that obtained by the A-SP function was 0.715.The positive correlation was found between the subjective LogMAR acuity and that calculated by the A-SP regression method (r=0.700,P＜ 0.01 ) and between the subjective LogMAR acuity and LogMAR acuity calculated by the A-logVA regression method (r=0.710,P＜0.01 ).SVEP LogMAR acuity from A-SP function regression method was significantly different from the LogMAR acuity from A-logVA function regression method (Z=-8.748,P＜0.01 ).No significant differences of VA LogMAR were found in gender,eyes,type of disease and age(x2 =2.171,P=0.338;x2 =0.976,P=0.614;x2 =6.032,P=0.420;x2 =14.720,P=0.257 ).Conclusions SVEP can obtain the visual outcome in human.The amplitude-logVA function regression method is more accurate in extrapolating SVEP acuity.
