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This is a new series of pseudoisochromatic plates for testing red-green vision published in 1943 and only recently reaching this country. It was designed by C. G. Boström, ophthalmic adviser to the Board of Swedish Railways, and I. Kugelberg, docent in ophthalmology at the Karolinska Institute, Stockholm, Sweden. The Swedish medical board has officially prescribed the use of this test for examinations of the color sense for traffic and transport service. (In preparing this review, I have taken the liberty of including information received in a personal communication from the publisher of the test.)
The series consists of 20 plates of uniform size, mounted so that their serial order permits variation. There are 15 plates with one numeral, 2 plates with a serpentine line and three dissimulation plates without design. All plates have the same outline pattern, which is filled with the same mosaic of round dots, 2.5 mm. in
Rand G. Tabulae pseudo-isochromaticae B.-K.: Plates for testing colour vision.. Arch Ophthalmol. 1947;38(1):127-128. doi:10.1001/archopht.1947.00900010130012