中华眼视光学与视觉科学杂志
中華眼視光學與視覺科學雜誌
중화안시광학여시각과학잡지
CHINESE JOURNAL OF OPTOMETRY OPHTHALMOLOGY AND VISUAL SCIENCE
2013年
10期
633-636
,共4页
ETDRS视力表%Snellen视力表%logMAR视力
ETDRS視力錶%Snellen視力錶%logMAR視力
ETDRS시력표%Snellen시력표%logMAR시력
EDTRS chart%Snellen chart%logMAR vision
早期糖尿病视网膜病变治疗研究(early treatment diabetic retinopathy study,ETDRS)视力表是在Bailey-Lovie视力表基础上发展出来专门用于临床试验的视力表,其原理较Snellen视力表科学和合理,精确度和可重复性都高于后者,检查所耗时间较后者长,其logMAR视力结果可直接用于视力统计.ETDRS视力表能通过不同测试距离(4、2、1 m)对极低视力进行量化和评分,并且不同测试距离视力值可相互转化.但1 m以下测量时理论值和实际测量值存在较大误差,为了避免夸大视力改进或丢失的情况,应谨慎对待不同测试距离的转化值.
早期糖尿病視網膜病變治療研究(early treatment diabetic retinopathy study,ETDRS)視力錶是在Bailey-Lovie視力錶基礎上髮展齣來專門用于臨床試驗的視力錶,其原理較Snellen視力錶科學和閤理,精確度和可重複性都高于後者,檢查所耗時間較後者長,其logMAR視力結果可直接用于視力統計.ETDRS視力錶能通過不同測試距離(4、2、1 m)對極低視力進行量化和評分,併且不同測試距離視力值可相互轉化.但1 m以下測量時理論值和實際測量值存在較大誤差,為瞭避免誇大視力改進或丟失的情況,應謹慎對待不同測試距離的轉化值.
조기당뇨병시망막병변치료연구(early treatment diabetic retinopathy study,ETDRS)시력표시재Bailey-Lovie시력표기출상발전출래전문용우림상시험적시력표,기원리교Snellen시력표과학화합리,정학도화가중복성도고우후자,검사소모시간교후자장,기logMAR시력결과가직접용우시력통계.ETDRS시력표능통과불동측시거리(4、2、1 m)대겁저시력진행양화화평분,병차불동측시거리시력치가상호전화.단1 m이하측량시이론치화실제측량치존재교대오차,위료피면과대시력개진혹주실적정황,응근신대대불동측시거리적전화치.
Early treatment diabetic retinopathy study (ETDRS) charts was designed for vision research,which incorporated features of the original Bailey-Lovie charts.Compared with Snellen chart.The design of ETDRS chart is much more scientific and reasonable,accuracy and repeatability is better,but it takes more time; the logMAR testing results of ETDRS chart can be used directly in statistics.low vision can be quantified and evaluated reliably by the ETDRS chart,by changing the viewing distance to 4,2,1 meter,conversion of logMAR values in different testing distance is applicable.Due to discrepancy between theoretical and virtual testing values,it's possible to exaggerate visual gain and loss,we should be cautious of converted values of different testing distance.