A report on the percentage of near-sight found to exist in the class of 1880 at Harvard College with some account of similar investigations: An account of the phakometer of Snellen A report on the percentage of near-sight found to exist in the class of 1880 at Harvard College with some account of similar investigations: An account of the phakometer of Snellen

Collection: Medicine in the Americas, 1610-1920 Alternate Title(s): Account of the phakometer of Snellen Uniform Title(s): Works Author(s): Derby, Hasket, 1835-1914 author Publication: Cambridge : Printed at the Riverside Press, 1877 Language(s): English Format: Text Subject(s): Myopia -- epidemiology Students Ophthalmology -- instrumentation Snellen, H. (Herman), 1834-1908. Harvard College (1780- ) Copyright: The National Library of Medicine believes this item to be in the public domain. (More information) Extent: 9 pages, 1 leaf of plates Illustrations: Illustrations and Plates NLM Unique ID: 101687827 (See catalog record) OCLC no.: 968132490 Permanent Link: http://resource.nlm.nih.gov/101687827