Commentatio de examine physiologico organi visus et systematis cutanei.

Purkynĕ was first to examine the interior of the human eye and the dog eye, using only a candle and a concave spherical lens. He thus invented the ophthalmoscope three decades before Helmholtz (1851; No. 5866). Reprinted in his Opera (No. 82), 1918,1, 163-94. English trans. in John, Jan Evangelista Purkyne, Philadelphia, 1959. See Albert & Miller, Jan Purkinje and the ophthalmoscope, Amer. J. Ophth., 1973, 76, 494-99.

Purkynĕ was also the first to classify fingerprints. Reprinted in his Opera omnia (No. 82), vol. 1, pp. 163-94, 1918. English translation in John, Jan Evangelista Purkynĕ, Philadelphia, 1959.