Refraction and how to refract, including sections on optics, retinoscopy
Subtitle: the fitting of spectacles and eyeglasses, etc
Edition: 4th ed. 
Publisher: P. Blakiston's son & co.
Published: 1909
Place of publication: Philadelphia
Language: eng
Number of pages: 324
Subjects: Accommodation and refraction. [from old catalog]; Examination. [from old catalog]; Eye