Device for measuring aberration refraction of the eye

Details Device for measuring aberration refraction of the eye Device for measuring aberration refraction of the eye

A - Human Necessities

61

B

A61B 3/103 (2006.01)

Patent

CA 2346704

An instrument for measuring aberration refraction of an eye is provided, having a lens system defining an instrument optical axis, and an alignment device for aligning the visual axis of the eye with the instrument optical axis. A light source (1) produces a probing beam that is projected through the lens system parallel to the instrument optical axis, and is selectively positioned partially offset from the instrument optical axis for entering the eye (15) parallel to the instrument optical axis at a plurality of locations on the cornea of the eye. A photo-detector (19) measures the position of probing beam light scattered back from the retina of the eye to measure aberration refraction of the eye at a plurality of locations.

La présente invention concerne un réfractomètre d'aberration oculaire, comportant un objectif qui forme un axe optique d'instrument, et un dispositif d'alignement permettant d'aligner l'axe visuel de l'oeil avec l'axe optique d'instrument. Une source lumineuse (1) produisant un faisceau d'exploration projeté sur l'objectif parallèlement à l'axe optique d'instrument est disposée sélectivement de façon partiellement décalée par rapport à l'axe optique d'instrument, de façon à pénétrer l'oeil (15) parallèlement à l'axe optique d'instrument à plusieurs endroits de la cornée de l'oeil. Un photodétecteur (19) mesure la position de la lumière du faisceau d'exploration rétrodiffusée de la rétine de l'oeil afin de mesurer la réfraction d'aberration de l'oeil à plusieurs endroits.

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