Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte Finish, 22 x

Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte Finish, 22 x

Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte Finish, 22" x 11".
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Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

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Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

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The Snellen eye test uses the idea of a subtended 5 minutes of arc with a 20 foot distance. This became the standard vision measurement. Also,

Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

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Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

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Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

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The Snellen eye test uses the idea of a subtended 5 minutes of arc with a 20 foot distance. This became the standard vision measurement. Also,

Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

KASHSURG Snellen and Tumbling E Non-Reflective Matte Finish Wall Eye Chart Size 22 x 11 Inch Combo Pack

Tech-Med Eye Charts, Illiterate Eye Test Chart, 20 ft, Non-Reflective Matte  Finish, 22 x

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20 ft: Wall Mount Eye Test Chart - Illiterate Tumbling E-442