From the collection of the US National Library of Medicine, an eye test chart designed by George Mayerle around 1907 to be a complete vision testing solution for speakers of several languages.

Running through the middle of the chart, the seven vertical panels test for acuity of vision with characters in the Roman alphabet (for English, German, and other European readers) and also in Japanese, Chinese, Russian, and Hebrew. A panel in the center replaces the alphabetic characters with symbols for children and adults who were illiterate or who could not read any of the other writing systems offered. Directly above the center panel is a version of the radiant dial that tests for astigmatism. On either side of that are lines that test the muscular strength of the eyes. Finally, across the bottom, boxes test for color vision, a feature intended especially (according to one advertisement) for those working on railroads and steamboats.

Mayerle was a German optometrist working in San Francisco when he made the chart, designing it for use in a city with a diverse population. My pals at 20x200 are offering limited-edition prints of Mayerle’s chart in a variety of sizes.

See also the history & typography of eye test charts, Optician Sans (a font based on eye chart typography), and Eye Charts for Drones.