C19 Chinese eye diagnosis chart showing Yin and Yang division

Muke jiejing (Shortcut to Ophthalmology), by Liu Song Yan, was composed in 1820 (25th year of the Jiaqing reign period of the Qing dynasty). It deals with the correspondences between the eye and the channels and organs of the body, the causes and processes of eye diseases, and the treatment of common eye diseases in relation to the pulses. Juan (Volume) 1 contains three illustrations of the diagnostic correlations of the eye.

Image heading: Bao and xuan diagram, closed eye