Low Vision pp 190-208 | Cite as

Prescribing Magnification: Strategies for improving Accuracy and Consistency

  • Ian L. Bailey
Conference paper

Abstract

All low vision practitioners develop their own individual approaches to prescribing magnifying devices. The simplest is the “cafeteria” approach in which the patient is presented with an array of low vision magnifiers and asked to make a selection. In time, the cafeteria will develop a corner delicatessan atmosphere with the proprietor proudly giving advice based on the experience and comments of previous customers. “Try this one, it seems stronger.” “Try moving closer, that often helps.” “See if it looks better through the bifocal part of your glasses.” In contrast, trained professionals prefer to use systems based on measurements of resolution ability, magnification effects, tests of performance and judgements of comfort and convenience.

Keywords

Refraction Lution Cataract Reso 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    I.L. Bailey, J.E. Lovie: New design principles for visual acuity letter charts. Am. J. Optom. Physiol. Opt. 53, 740 (1976)PubMedGoogle Scholar
  2. 2.
    F.L. Ferris, A. Kassoff, G.H. Bresnick, I.L. Bailey: New visual acuity charts for clinical research. Am. J. Ophthalmol. 94, 91 (1982)PubMedGoogle Scholar
  3. 3.
    G. Strong, G.C. Woo: Distance visual acuity chart incorporating some new design features. Arch. Ophthalmol. 103, 44 (1985)PubMedGoogle Scholar
  4. 4.
    L.L. Sloan: New test charts for the measurement of visual acuity at far and near distances. Am. J. Ophthalmol. 48, 807 (1959)PubMedGoogle Scholar
  5. 5.
    I.L. Bailey, J.E. Lovie: The design and use of a new near vision chart. Am. J. Optom. Physiol. Opt. 57, 378 (1980)PubMedGoogle Scholar
  6. 6.
    C.H. Keeler: Visual aids for the pathological eye (excluding contact lenses). Trans. Ophthalmol. Soc. U.K. 76, 605 (1956)Google Scholar
  7. 7.
    H.T. Lewis: UNC near vision chart. J. Vision Rehab. 3(1), 8 (1985)Google Scholar
  8. 8.
    L.L. Sloan, D. Brown: Reading cards for selection of optical aids for the partially sighted. Am. J. Ophthalmol. 55, 1187 (1963)Google Scholar
  9. 9.
    I.L. Bailey: Centering high addition spectacle lenses. Optom. Mthly. 70, 523 (1979)Google Scholar
  10. 10.
    I.L. Bailey: Combining hand magnifiers with spectacle additions. Optom. Mthly. 71, 458 (1980)Google Scholar
  11. 11.
    I.L. Bailey: The use of fixed-focus stand magnifiers. Optom. Mthly. 72(8), 37 (1981)Google Scholar
  12. 12.
    I.L. Bailey: Principles of near vision telescopes. Optom. Mthly. 72(9), 32 (1981)Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1987

Authors and Affiliations

  • Ian L. Bailey

There are no affiliations available

Personalised recommendations