Compact subjective refractor for lens value determination

Details Compact subjective refractor for lens value determination Compact subjective refractor for lens value determination

A - Human Necessities

61

B

88/121.5

A61B 3/02 (2006.01) A61B 3/13 (2006.01)

Patent

CA 1097112

AO-3288 AHS/le COMPACT SUBJECTIVE REFRACTIVE INSTRUMENT ABSTRACT OF THE DISCLOSURE A compact ophthalmic instrument for refraction of patient's eyes is obtained by substantial folding of the optical system. The optical system is folded in one location using a reflection means that moves to vary the location of a target image being viewed by a patient for identifying the spherical power of a corrective lens, if any, required by the patient. A second folded portion of the optical system contains a cylinder means for cylindrically varying the target image. - 1 -

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