Apparatus for testing clearness of vision

Details Apparatus for testing clearness of vision Apparatus for testing clearness of vision

A - Human Necessities

61

B

A61B 3/032 (2006.01) A61B 3/117 (2006.01) A61B 3/12 (2006.01)

Patent

CA 2124286

An apparatus for testing clearness of vision, particularly when there is impaired refracting medium in an eye, includes a lamp (1) and a pin-hole diaphragm (4) arranged in a light-beam path downstream of the lamp with a single diffraction grating (6), being provided in the light-beam path downstream of the pin-hole diaphragm.

Un appareil pour vérifier la netteté de la vision, en particulier quand il y a un milieu de réfraction abîmé dans un oeil, comprend une lampe (1) et une membrane à trou d'épingle (4) placée dans le trajet d'un faisceau lumineux en aval de la lampe avec une seule grille de diffraction (6) placée dans le trajet du faisceau lumineux en aval de la membrane à trou d'épingle.

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