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BEXCO - 𝐒𝐍𝐄𝐋𝐋𝐄𝐍 𝐄𝐘𝐄 𝐂𝐇𝐀𝐑𝐓 - 𝐄𝐗𝐀𝐌𝐈𝐍𝐀𝐓𝐈𝐎𝐍 𝐒𝐧𝐞𝐥𝐥𝐞𝐧 𝐄𝐲𝐞 𝐓𝐞𝐬𝐭 𝐂𝐡𝐚𝐫𝐭𝐬 𝐈𝐧𝐭𝐞𝐫𝐩𝐫𝐞𝐭𝐚𝐭𝐢𝐨𝐧 Snellen designed his optotypes on a 5×5 grid, on which the line thickness is one unit and the letter width
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Amazon.com: Eye Chart, Snellen Eye Chart, Wall Chart, Eye Charts for Eye Exams 20 feet 11 X 22 in. : Industrial & Scientific
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Amazon.com: Snellen LED Visual Acuity Chart 22" LED Display with Remote Control, Working Distance 2.5 M- 6 M : Industrial & Scientific
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