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The visual impairment demonstrated within this tool is for illustrative purposes only and therefore the accuracy of impairment is most achievable within a web-based platform. This accuracy, alongside any assumptions and changes made to achieve this, has been assessed and approved by two independent optometrists and an independent ophthalmologist. This includes the blurring of the entire demonstrated visual field and use of results and scenarios that can be best replicated for use within this tool. For best use of the Visual Acuity Tool, we recommend a monitor with resolution 2048 x 1536 and a pixel density of 264 pixels per inch (ppi). You should sit in a natural position from your monitor, roughly 80 cm away.