Process and apparatus for examining the visual funcions of...

A - Human Necessities – 61 – B

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A61B 3/06 (2006.01) A61B 3/113 (2006.01) A61B 5/00 (2006.01) A61B 5/16 (2006.01)

Patent

CA 2530011

The visual function is determined with the help of test images, comprising inducing photostress induced by illuminating the eye with an intense light, then measuring the time needed for the recovery of the visual function before the illumination. The test images are periodically moving test images, and the visual function is determined on the basis of detecting the phenomenon of optokinetic nystagmus. According to another process the visual function is determined by measuring critical fusion frequency (CFF) before and after the photostress.

L'invention concerne un procédé permettant de déterminer une fonction visuelle au moyen d'images d'essai, qui consiste à induire une photoélasticité par éclairage de l'oeil avec une lumière intense, puis à mesurer le temps nécessaire pour la récupération de la fonction visuelle d'avant l'éclairage. Les images d'essai sont des images d'essai animées de manière périodique, et la fonction visuelle est déterminée sur la base de la détection du phénomène du nystagmus optocinétique. Conformément à un autre procédé, la fonction visuelle est déterminée par mesure de la fréquence critique de fusion (CFF) avant et après l'induction de la photoélasticité.

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