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A SCANNING FOCIMETER TO MEASURE PERIPHERAL LENS POWERS
Author(s) -
Simonet Pierre,
Papineau Yves,
Gordon Dominique
Publication year - 1983
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1983.tb00617.x
Subject(s) - vertex (graph theory) , lens (geology) , measure (data warehouse) , optics , radius , projection (relational algebra) , mathematics , power (physics) , physics , computer science , combinatorics , algorithm , graph , computer security , database , quantum mechanics
A special device adapted to a Nikon projection vertexometer permits the power to be measured in the periphery of ophthalmic lenses. The marginal power can be measured with respect to the vertex sphere. Various values of the vertex sphere radius can be obtained with this instrument. The characteristics of this modified focimeter are described in this paper.