Principles and practices of refraction
Subtitle: an elementary treatise on the science of refraction as applied to 'sight-testing', including essays on retinoscopy, astigmatism, ophthalmoscopy, asthenopia, frame fitting and muscular insufficiencies, etc
By: by Lionel G. Amsden
Series: CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches -- no. 65597; CIHM/ICMH microfiche series -- no. 65597
Publisher: Canadian Optician
Published: 1903
Place of publication: Toronto
Language: eng
Format: [microform] :
Number of pages: 124
Subjects: Lunettes; Eyeglasses; Eye; Accommodation et réfraction; Maladies et défauts; Accommodation and refraction; Diseases and defects; Oeil
Notes: Filmed from a copy of the original publication held by the National Library of Canada. Ottawa : Canadian Institute for Historical Microreproductions, 1998.

224 p. : ill. ; 23 cm.