Letter to the Editor concerning “A systematic review of controlled trials on visual stress using intuitive overlays or colorimeter"
KeywordVisual stress; Intuitive overlays; Reading; Coloured filters; Coloured lens; Effects; Randomised controlled trials (RCTs); Systematic reviews; Bias
Rights© 2016 Spanish General Council of Optometry. Published by Elsevier Espana, S.L.U. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).