An additional method to determine the degree of ametropia.

[New York] : [publisher not identified], [1871]

8 pages : illustrations ; 24 cm

'Repr. from Tr. Am. Ophth. Soc. 1870, N.Y., 1871, vii' - Index Cat. of Surgeon General's Library

Anonymous

Caption title

This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.