Bachman W G
School of Optometry, University of Missouri-St. Louis 63121-4499.
J Occup Med. 1992 Oct;34(10):1023-7.
Twenty-nine presbyopic subjects who spent at least 20 hours a week at a video display terminal compared a progressive addition lens designed for this function, with another commonly prescribed task-specific lens. Each of the paired lens types was worn for 4 weeks and then compared directly for 1 week. A statistically significant (P < .05) portion of the subjects (76%) preferred the task-specific lenses overall. It also was preferred more frequently for each feature compared, although the difference was statistically significant (P < .05) only for utility of distance vision. Both of the task-specific designs contributed to symptomatic relief. The presence of a distance-clear zone and the absence of lens discontinuities most likely account for user preference for the task-specific lenses. That preference suggests improved performance for presbyopic computer users wearing task-specific progressive addition lenses.
29名每周至少在视频显示终端前花费20小时的老花眼受试者，将一款为此功能设计的渐进多焦点镜片与另一种常用的特定任务处方镜片进行了比较。每种配对的镜片类型佩戴4周，然后直接比较1周。总体上，有统计学意义（P < .05）比例的受试者（76%）更喜欢特定任务镜片。在比较的每个特征方面，特定任务镜片也更常被青睐，不过只有在远视力效用方面差异具有统计学意义（P < .05）。两种特定任务设计都有助于缓解症状。存在清晰的远用区域以及镜片无间断最有可能是用户偏爱特定任务镜片的原因。这种偏爱表明，佩戴特定任务渐进多焦点镜片的老花眼电脑用户的表现有所改善。
