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(1) Key card for Pigassou Optotypes
lens field of view image mag laser spot working distance Digital Wide Field 103°/124°
used worldwide by ophthalmologists and emergency room physicians
portability and convenience
Welch Allyn Illuminator models:
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