Non-contact tonometer having off-axis fluid pulse system

A - Human Necessities – 61 – B

Patent

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Details

A61B 3/10 (2006.01) A61B 3/14 (2006.01) A61B 3/16 (2006.01)

Patent

CA 2269761

A non-contact tonometer includes a fixation axis (12) intersecting the corneal vertex (7), and a fluid axis (18) angularly displaced from the fixation axis (12) to form a non-zero angle therewith. A nozzle (20) is axially aligned along the fluid axis (18) for discharging a fluid pulse along the fluid axis to the corneal surface (4) of the eye. In a preferred embodiment, the fixation and fluid axes (12, 18) reside in the same vertical plane, with the fluid axis (18) below the fixation axis (12) approaching the eye. Alignment and applanation detection optics are arranged coplanar with the fluid axis.

L'invention concerne un tonomètre sans contact comprenant un axe de fixation (12) dont le point d'intersection avec la surface de la cornée se situe au sommet (7) de la cornée, et un axe de fluide (18) déplacé de façon angulaire par rapport à l'axe de fixation (12) pour former un angle différent de zéro avec ce dernier. Un ajutage (20) est aligné axialement le long de l'axe de fluide (18) pour distribuer une impulsion de fluide, le long de l'axe de fluide, à la surface cornéenne (4) de l'oeil. Dans un mode de réalisation préféré de l'invention, les axes de fixation et de fluide (12, 18) sont situés dans le même plan vertical, l'axe de fluide (18) étant placé sous l'axe de fixation (12) s'approchant de l'oeil. Des éléments optiques de détection d'alignement et d'aplanissement sont placés dans le même plan que l'axe de fluide.

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