Suttle Catherine M, Conway Miriam L
Division of Optometry and Visual Science, City, University of London, London, UK.
Clin Exp Optom. 2025 Jan;108(1):72-78. doi: 10.1080/08164622.2024.2302822. Epub 2024 Jun 6.
Colour overlays and lenses are used to relieve symptoms in some patients diagnosed with visual stress, but evidence to support this practice is lacking. In this small randomised crossover trial, a range of colours are beneficial and precise colour specification does not enhance this effect.
This randomised, double-masked crossover trial aimed to test effectiveness of precisely selected lens tints for visual stress.
Twenty-nine participants aged 11 to 72 (mean 30) years diagnosed with visual stress were issued with their selected coloured overlay then with tinted lenses at two colour settings. An eye examination and coloured overlay test were followed by intuitive colorimetry to select a colour to minimise symptoms (optimal tint) and the closest setting at which the symptoms returned (sub-optimal, or placebo tint). The tints were worn for one month each in randomised order. Reading speed was measured using the Wilkins Rate of Reading Test, a subjective scale was used to gauge symptoms, and the patient was asked to indicate whether one of the tints alleviated their symptoms more than the other.
Reading speed was significantly higher with colour than without ( < 0.001), but was similar with the overlay and both tints ( = 1.0). Discomfort/distortion rating (1-7) was lower with colour than without ( < 0.001), but no difference was found between the overlay and both tints ( > 0.1). About half (47%) of the patients preferred/strongly preferred their optimal tint, and 39% preferred/strongly preferred their sub-optimal tint, while 14% had no preference.
While our patients read more quickly and were more comfortable when using a tint, there was no difference in outcome between the optimal and sub-optimal tints. These results suggest that for patients diagnosed with visual stress, precision tints are no more helpful than sub-optimal, placebo tints.
颜色叠加片和镜片被用于缓解一些被诊断为视觉应激患者的症状，但缺乏支持这种做法的证据。在这项小型随机交叉试验中，一系列颜色都有益处，且精确的颜色规格并不能增强这种效果。
这项随机、双盲交叉试验旨在测试精确选择的镜片颜色对视觉应激的有效性。
29名年龄在11至72岁（平均30岁）被诊断为视觉应激的参与者，先被给予他们选择的颜色叠加片，然后是两种颜色设置的有色镜片。在进行眼科检查和颜色叠加片测试后，通过直观比色法选择一种能使症状最小化的颜色（最佳色调）以及症状再次出现时最接近的设置（次优或安慰剂色调）。这些色调以随机顺序各佩戴一个月。使用威尔金斯阅读速度测试来测量阅读速度，用主观量表来评估症状，并要求患者指出其中一种色调是否比另一种更能缓解他们的症状。
有颜色时的阅读速度显著高于无颜色时（<0.001），但颜色叠加片和两种色调的阅读速度相似（=1.0）。有颜色时的不适/变形评分（1 - 7分）低于无颜色时（<0.001），但颜色叠加片和两种色调之间没有差异（>0.1）。约一半（47%）的患者更喜欢/非常喜欢他们的最佳色调，39%的患者更喜欢/非常喜欢他们的次优色调，而14%的患者没有偏好。
虽然我们的患者在使用一种色调时阅读速度更快且更舒适，但最佳色调和次优色调之间的结果没有差异。这些结果表明，对于被诊断为视觉应激的患者，精确的色调并不比次优的安慰剂色调更有帮助。
