IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. An inscription reads “SEITZ TEST ...

The Jaeger chart was designed to test near vision acuity. Eduard Jaeger von Jaxtthal (1818–1884) was an Austrian ophthalmologist and a professor at the University of Vienna who, in the 1850s, made ...