Recommended aids for the partially sighted
Subtitle: Including A nontechnical explanation of basic optical principles [by] Louise L. Sloan and Stephen J. Ryan
Edition: Rev. 2d ed.
Publisher: National Society for the Prevention of Blindness
Published: 1971
Place of publication: New York
Language: eng
Number of pages: 64
Subjects: Optics and Photonics; Lenses; Ocular Vision; Vision Disorders; Rehabilitation