Oculus hoc est : fundamentum opticum in quo ex accurata oculi anatome, abstrusarum experientiarum sedula pervestigatione, ex inuisis specierum visibilium tam euerso quam erecto situ spectaculis, necnon solidis rationum momentis radius visualis eruitur sua visioni in oculo sedes decernitur, angvli visorii ingenium aperitur ...
Christoph Scheiner's Oculus, a Latin treatise on the anatomy of the eye and the path of the visual ray, printed at Innsbruck by Daniel Agricola in 1619 for physicians, astronomers and natural philosophers. The plates are small woodcut diagrams set into the text: sectioned eyeballs drawn as nested circles and lens shapes, crossed by straight ruled rays and labelled A through P, usable as line-based geometric motifs, anatomical schematics and letter-annotated figure work.
