Early 20th century eye disorder models for use by students of ophthalmology, the study of the eye and its disorders and their treatment. This is Dunn's model eye kit, manufactured by F. Davidson of London in around 1900. The kit was used to teach medical students about the appearance of different eye conditions. Among the examples seen here are bloodshot eyes, burst corneal blood vessels, cataracts, defects of the iris, defects of the pupil, and eye tumours or growths.