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Description	English: Page 423 from "A treatise on the eye, the manner and phaenomena of vision" by William Porterfield, Published 1759 in Edinburgh. In this book the word "optometer" appears for the fist time.
Date	1759
Source	Original publication: Porterfield, W. (1759). A treatise on the eye, the manner and phaenomena of vision. Edinburgh: A. Miller, G. Hamilton and J. Balfour. Immediate source: http://openlibrary.org/works/OL16073963W/A_treatise_on_the_eye_the_manner_and_phaenomena_of_vision
Author	William Porterfield (Life time: ca. 1696–1771)

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:49, 27 April 2013		2,063 × 3,521 (631 KB)	Antonio Calossi	{{subst:Upload marker added by en.wp UW}} {{Information \|Description = {{en\|Page 423 from "A treatise on the eye, the manner and phaenomena of vision" by William Porterfield, Published 1759 in Edinburgh. In this book the word "optometer" appears for th...