I created this chart from the chart Herman Snellen developed in 1862, which is now in public domain. Search Spoonflower for 'visionchart' to see more colors/sizes/variants, and search for 'kblackwhite' for matching B&W designs and solids. This design (currently set to 646 DPI, with 3.25"x 1.13" charts, and 4"x2" on wallpaper) can also be scaled or recolored according to your needs - just Spoonmail me or leave a comment!
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