Eye testing method by red visual target and green visual...

A - Human Necessities – 61 – B

Patent

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A61B 3/02 (2006.01) A61B 3/032 (2006.01) A61B 3/06 (2006.01)

Patent

CA 2247473

A red/green tester judging whether a glass lens or a contact lens is correct or not, or suitable or too strong, has a case (1). The inside of the case (1) is divided into left and right divisions by a partition plate (2). A red test lamp (3R) and a green test lamp (3G) are provided on the left and right sides of the partition plate (2), respectively. A red film (5) and a green film (6) are provided on the front of the case (1) on the left and right sides of the partition plate (2) respectively through an opal screen (4). Black fixed marks (8 and 9) which have identical patterns and sizes are provided in the positions corresponding to the lamps (3R and 3G) on the fronts of both films (5 and 6). A switching circuit which, after operating or flashing the lamp (3G) for a certain time, operates the lamp (3G) and the lamp 3R simultaneously is provided. Thus, the red/green mark test can be carried out while the adjustment of the crystalline lens which is performed by the subject unconsciously can be avoided as much as possible.

Dispositif de test rouge/vert permettant d'estimer si un verre optique ou une lentille de contact est adapté ou non, si la puissance correctrice est correcte ou trop importante. Le dispositif comporte un boîtier (1) dont l'intérieur est divisé en un compartiment droit et un compartiment gauche par une plaque de séparation (2). Une lampe de test rouge (3R) et une lampe de test verte (3G) sont placées respectivement à gauche et à droite de la plaque de séparation (2). Une pellicule rouge (5) et une pellicule verte (6) sont disposées sur l'avant du boîtier (1) respectivement à gauche et à droite de la plaque de séparation, sur un écran opalin (4). Des repères noirs fixes (8 et 9), de forme et de taille identiques, sont disposées sur les faces frontales des pellicules (5 et 6) dans des positions correspondant aux lampes (3R et 3G). Un circuit de commutation fait fonctionner ou clignoter la lampe (3G) pendant un certain temps, puis allume les lampes (3G) et (3R) simultanément. Ce test rouge/vert avec repères permet par conséquent d'éviter autant que possible l'ajustement du cristallin réalisée inconsciemment par le sujet.

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