Allgemeine Theorie der monochromatischen Aberrationen und ihre nächsten Ergebnisse für die Ophthalmologie
A 1900 German optics monograph by Allvar Gullstrand, published in Upsala, treating monochromatic aberrations of the eye for ophthalmologists. Its four pictured figures are geometric line diagrams: a fan of rays from a point O, with lettered points C, D, E, F and G marking where converging lines cross and curved caustic-like arcs form. A designer could borrow the clean schematic style of ray-tracing diagrams with sparse labels for technical or scientific graphics.
