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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© 1982 Macmillan Publishers Limited
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Ruben, M., Woodward, E.G. (1982). Instruments. In: Revision Clinical Optics. Palgrave, London. https://doi.org/10.1007/978-1-349-16806-4_5
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DOI: https://doi.org/10.1007/978-1-349-16806-4_5
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-30705-2
Online ISBN: 978-1-349-16806-4
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