Letter to the Editor: Authors' response.

yesWe thank Professors Evans and Wilkins for their interest in our systematic review.(1) We have reached the same conclusion as previous systematic reviews published in 2008(2) and 2014(3) and a review prepared for the New Zealand Ministry for Health in 2009.(4) Even the ‘alternative systematic review’ prepared by Professors Evans and Allen about which we have significant misgivings concludes that ‘larger and rigorous randomised controlled trials of interventions for visual stress are required’.(5)A response to Professors Evans and Wilkins regarding the systematic review: Griffiths PG, Taylor RH, Henderson LM and Barrett BT (2016) The effect of coloured overlays and lenses on reading: a systematic review of the literature. Ophthalmic & Physiological Optics. 36: 519–544