Not a hugely useful device on the site, as you’re limited to the resolution of your monitor; the physical size of the screen and the distance from it both mean that it is impractical to actually measure your own vision.
But it can be a useful aid to quickly help track changes in vision after an operation, or an episode of hydrops. If you want a more accurate chart which you can print out and stick to the wall, try our Printable Chart.
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