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Research paper available

You can now read our complete research paper on the redevelopment of the Kay Picture Test online. We have undertaken extensive research for our improved Kay Picture optotypes that provide a reliable visual acuity measurement comparable with ETDRS. The set of six pictures has an improved and modernised design with consideration of recent research evidence on spacing and crowding. In our research the pictures were shown to be the most recognisable to children under 30 months and with minimum variability in legibility across the optotypes.