The practice of retinoscopy with remarks on errors of refraction, their correction and the uses of an improved model eye

Historical Significance: Percy Dunn was ophthalmic surgeon in the West London Hospital and lecturer in ophthalmology at the West London Post Graduate College. It was written principally to promote Dunn's model eye, an advertisement for which is on page 59. The book accompanied the model eye. The advertisements are especially interesting. Ophthalmologists were dismissive of the need to correct refractive errors in the 19th C and were not quick to put the ideas of Donders into practice but, as this book illustrates, started to do so at the end of the 19th C at the same time as opticians took up the science of refraction as a means of determining best spectacle correction.