4. The Effect of Wearing ChromaGen Lens II on Visual Stress, Binocular Visual Functions and Reading Performance in Children with Dyslexia

Sharanjeet-Kaur1* & Mizhanim Mohamad Shahimin1, Rifizati Buyong1

1. Universiti Kebangsaan Malaysia

 

Abstract

 

Dyslexia is a neurodevelopmental disorder that primarily affects reading ability. There are many anecdotal claims that coloured lenses and overlays improve reading performance. However, the effectiveness is still controversial. This study aimed to compare visual stress levels, binocular visual functions and reading performance on children with dyslexia without and with the second generation of ChromaGen lens (ChromaGen lens II). A total of 28 children with dyslexia were invited to participate in this study. All subjects were free from ocular and systemic diseases and never had any visual intervention for their dyslexia problem. The study involved pre -and post-assessments of visual stress, binocular visual functions and reading performance without and with ChromaGen lens II wear. Each individual subject chose their own preferred colour of the Chromagen lens II. For both pre-and post-assessments, the subjects completed a computerised visual stress test (Lucid ViSS) and a series of binocular visual function tests (stereopsis, the amplitude of accommodation, fixation disparity, lag of accommodation and near the point of convergence). The reading performance was assessed based on reading rate and time. The results for visual stress showed no significant difference with and without wearing the ChromaGen lens II (Z = -1.107, p = 0.268). There were no significant differences in other binocular vision functions except for stereopsis (Z = -4.413, p = 0.00) with and without wearing ChromaGen lens II. There were also no significant improvements in reading time (Z = -0.159, p = 0.873) and reading rate (Z = -1.0.47, p = 0.295) with and without wearing the ChromaGen lens II. The findings suggest that ChromaGen lens II does not improve reading performance in children with dyslexia. It also does not change most binocular vision functions except stereopsis.

 

Keywords:           Dyslexia, visual stress, reading, coloured lenses, binocular visual performance

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4. The Effect of Wearing ChromaGen Lens II on Visual Stress, Binocular Visual Functions and Reading Performance in Children with Dyslexia
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