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Subjective Refraction Techniques in the Frame of the Three-Dimensional Dioptric Space

Muñoz-Escrivá, L. OD; Furlan, Walter D. PhD


A novel heuristic approach to the well-known representation of the dioptric power in a three-dimensional space is presented. It is shown how this theoretical framework is ideal for discussing the principles of several subjective refraction methods. In particular, this formalism is used to justify the stenopaic slit refraction, the Barnes subjective refraction technique, and the Jackson cross-cylinder procedure. In view of this analysis, some modifications to the traditional procedures are proposed.

Optics Department, University of Valencia, Burjassot, Spain

Laura Muñoz Escrivá

Optics Department

University of Valencia

E-46100 Burjassot, Spain


© 2001 American Academy of Optometry