Cho M H, Spear C H, Caplan L
School of Optometry, University of Alabama, Birmingham 35294.
J Am Optom Assoc. 1991 Sep;62(9):672-5.
Twenty-nine subjects wearing Varilux Plus (Varilux 2) or Varilux Infinity lenses were drawn from the UAB School of Optometry primary care clinic population. Using a double-masked, randomized cross-over design, subjects wore one pair of progressive addition lenses (PALs) with a normal add and one pair with the add overplussed by 0.50 D. Subjects wore each pair of lenses for 1 week. Twenty-five of the 29 patients preferred the normal add over the overplussed add. In all subjective response categories the normal add was rated higher than the overplussed add.
从阿拉巴马大学视光学院初级保健诊所的人群中选取了29名佩戴万里路渐进多焦点镜片Ⅱ代（Varilux 2）或万里路渐进多焦点镜片Infinity的受试者。采用双盲、随机交叉设计，受试者佩戴一副度数正常的渐进多焦点镜片（PALs）和一副度数额外增加0.50 D的渐进多焦点镜片。受试者每副镜片佩戴1周。29名患者中有25名更喜欢度数正常的镜片，而非度数增加的镜片。在所有主观反应类别中，度数正常的镜片评分均高于度数增加的镜片。
