Northway Nadia
Department of Vision Sciences, Glasgow Caledonian University, Cowcaddens, Glasgow G4 0BA, UK.
Ophthalmic Physiol Opt. 2003 Sep;23(5):457-64. doi: 10.1046/j.1475-1313.2003.00144.x.
Coloured overlays have been advocated to enhance reading speed and ability in children with reading difficulty or dyslexia. Assessing the efficacy of overlays has to date been largely subjective. Objective assessment is presently carried out with the Rate of Reading test (RRT), where an increase in reading speed of more than 5% is considered to indicate a positive prognosis for continued use of the overlay. The Developmental Eye Movement (DEM) test is used to assess horizontal scanning behaviour in a number naming task. In this study both tests were utilised to determine whether coloured overlays could enhance reading performance or scanning. This article shows that for some children rate of reading is not improved with coloured overlays although performance on the DEM test does improve. Improvements to the DEM scores occurred in 88% of children who continued to use overlays for more than 3 months. This compared with 60% sensitivity in the RRT. The possible reasons for this phenomenon and the clinical implications are discussed.
有人主张使用彩色滤光片来提高阅读困难或患有诵读困难症儿童的阅读速度和能力。迄今为止，对彩色滤光片效果的评估很大程度上是主观的。目前通过阅读速度测试（RRT）进行客观评估，阅读速度提高超过5%被认为表明继续使用彩色滤光片有良好的预后。发育性眼球运动（DEM）测试用于在数字命名任务中评估水平扫描行为。在本研究中，两项测试都被用来确定彩色滤光片是否能提高阅读表现或扫描能力。本文表明，对于一些儿童来说，彩色滤光片虽然能提高DEM测试的表现，但并不能提高阅读速度。在继续使用彩色滤光片超过3个月的儿童中，88%的儿童DEM分数有所提高。相比之下，RRT的敏感度为60%。本文讨论了这一现象的可能原因及其临床意义。
