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Mayerle’s International Test Chart (1907)

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Optometrist George Mayerle combined an array of eye tests on a single chart that, he boasted, was ‘accurate, artistic, ornamental, practical and reliable.’ Marketing the chart to fellow practitioners, he promised that it ‘makes a good impression and convinces the patient of your professional expertness.’

San Francisco. Lithograph with hand-colored swatches on cardboard.