Stand magnifiers: an evaluation of new optical aids from COIL

Optom Vis Sci. 1989 Nov;66(11):766-73.

Abstract

This paper discusses stand magnifiers and the optical parameters that clinicians should know in order to understand the viewing requirements and the expected resolution for low vision patients. We report on measurements made of key optical parameters of a new series of stand magnifiers from Combined Optical Industries Limited (COIL) and comparison is made to the previous series of stand magnifiers from the same manufacturer. These results illustrate that manufacturers' specifications of optical parameters are generally inaccurate and misleading. We urge manufacturers to provide clinically relevant information about their optical products.

Publication types

  • Comparative Study
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Equipment Design
  • Evaluation Studies as Topic
  • Humans
  • Lenses / standards*
  • Optics and Photonics
  • Reproducibility of Results
  • Sensory Aids / standards
  • Vision, Low / therapy*