Ciuffreda K J, Goldner K, Connelly R
Br J Ophthalmol. 1980 Aug;64(8):607-12. doi: 10.1136/bjo.64.8.607.
Recent reports have described marked improvement of visual acuity in amblyopic eyes of young children following monocular exposure to square-wave gratings presented at a variety of spatial frequencies and orientations for as little as 7 minutes. We sought to confirm and expand on these investigations, with emphasis on single-session results. Sixteen juvenile and 11 adult amblyopes and 26 control subjects were used. Visual acuity was determined before and after a 7-minute stimulation period using an E-chart that controlled for contour interaction. The 50% visual acuity threshold corrected for guessing was computer calculated by probit analysis. Results show that frequency, range, and magnitude of changes (either increases or decreases) in visual acuity following stimulation were approximately the same (< +/- 10% Snell-Sterling) in both amblyopic and control groups. These findings suggest that brief exposure to the grating patterns had little if any beneficial effect on visual acuity in amblyopic eyes.
最近的报告描述了幼儿弱视眼在单眼暴露于各种空间频率和方向的方波光栅下仅7分钟后视力有显著改善。我们试图证实并扩展这些研究，重点是单次治疗的结果。我们使用了16名青少年弱视患者、11名成人弱视患者和26名对照受试者。在7分钟的刺激期前后，使用控制轮廓相互作用的电子视力表测定视力。通过概率分析计算机计算出校正猜测后的50%视力阈值。结果表明，弱视组和对照组在刺激后视力变化的频率、范围和幅度（增加或减少）大致相同（<+/-10%斯内伦-斯特林）。这些发现表明，短暂暴露于光栅图案对弱视眼的视力几乎没有有益影响。
