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(1) Key card for Pigassou Optotypes
-Half the weight of the traditional 3
Manufacturer Part Number: VIRIDD10
the device takes 25 corneal measurements (in rapid succession) at a single location and calculates the average and standard deviation
Ishihara Test Chart Book, for Color Deficiency Size:24 Plate (1) Key card for PigassouManufacturer Part Number: 1257 (10 Plate), 1254 (14 Plate), 1255 (24 Plate), 1256 (38 Plate) Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red green blindness, each in two forms, complete and incomplete. Includes four special plates for tests to determine the kind and degree of defect in color vision. Makes use of the peculiarity that in red green blindness, blue and yellow appear
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