EYES AND INFOGRAPHICS.

Teaching aid A 1965 model from Michael Stoll’s collection. Made by Somso Models of Sonneberg, Germany. http://www.somso.de/en/somso/

Eye test The Snellen chart (which originated in 1862) is the most common.

Poster Of course, there are plenty of detailed eye diagrams around. If you want one for the wall: goo.gl/6SjuZz

Phoropter Great-looking instrument for precise optical measurements. I don’t care what it does, I just like the dials.

Photograph by Christian Weibull.

Color vision The Ishihara test can detect red-green vision deficiencies. This is one of the 38 test plates.

Vintage Illustrations from historical medical books.

Above, from Die Frau als Hausärztin, 1911. Below, from Meyers Konversations-Lexicon, 1897. (Hein Nouwens/shutterstock.com)

Eye color There are endless variations. Brown is the most common color, according to the American Academy of Ophthalmology.

Photograph © Taiga/123rf

A chart of doll eyes.

Signage This kind of design was very common years ago.

Giant eye Tony Tasset created a 30-foot (9-meter) diameter fiberglass eyeball (modeled on his own eye) in 2007. It’s a well-traveled item. First on display in Chicago’s Pritzer Park, then on the roadside in Sparta, Wisconsin (where it was originally constructed), and now in the Joule Hotel’s sculpture garden in Dallas.

Photograph by Carol M.Highsmith.