Epstein L H, Collins F L, Hannay H J, Looney R L
J Behav Med. 1978 Sep;1(3):273-87. doi: 10.1007/BF00846679.
Two experiments assessing the modification of visual acuity by fading plus feedback procedures are presented. The training procedure involved a gradual increase of the distance myopic subjects could accurately discriminate letters requiring a minimum of 20/20 vision at approximately 23 feet. In Experiment I experimental and matched control groups of mildly to moderately myopic subjects were compared on repeated Ortho-rater examinations of visual acuity. The experimental group showed a significant improvement relative to the control group who received no training. Multiple-baseline across-stimuli designs were used in Experiment II to evaluate training effects for another group of subjects with moderate to severe myopia. Two measures of acuity were obtained. Accuracy of discrimination of letters at various preselected distances was determined each session while Ortho-rater examinations were given periodically throughout training. Changes in discrimination accuracy over sessions appeared to be related to fading for three of the four subjects, and Ortho-rater acuity changes were observed for each subject. Some short-term maintenance of improved vision was evident on both acuity measures.
本文介绍了两项评估通过消退加反馈程序改善视力的实验。训练程序包括逐渐增加近视受试者能够准确辨别字母的距离，这些字母在约23英尺处至少需要20/20的视力。在实验I中，对轻度至中度近视受试者的实验组和匹配对照组进行了多次视力的Ortho-rater检查比较。实验组相对于未接受训练的对照组显示出显著改善。实验II采用跨刺激多基线设计来评估另一组中度至重度近视受试者的训练效果。获得了两种视力测量指标。每次训练时确定在各种预先选定距离上辨别字母的准确性，同时在整个训练过程中定期进行Ortho-rater检查。在四个受试者中的三个身上，各次训练中辨别准确性的变化似乎与消退有关，并且每个受试者的Ortho-rater视力都有变化。在两种视力测量指标上都明显有一些改善视力的短期维持情况。
