Instruments

  • Montague Ruben
  • E. Geoffrey Woodward
Chapter

Abstract

The focimeter has a movable illuminated target B. The emerging rays from the standard lens are neutralised by the spectacle lens being tested (the telescope is previously adjusted for the user so as to correct any refractive error of the operator). The target is then clearly seen.

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Copyright information

© Macmillan Publishers Limited 1982

Authors and Affiliations

  • Montague Ruben
  • E. Geoffrey Woodward

There are no affiliations available

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