geekpastor.com,for,Plate,,Vision,Test,14,Ishihara,Test,,/gabelled907928.html,Industrial Scientific , Professional Medical Supplies , Examination Supplies Consumabl,$139,Color,C,Plate,Red-Green Ishihara Color Plate Test Ranking integrated 1st place 14 Vision Red-Green for C $139 Ishihara Color Plate Test, 14 Plate, Vision Test for Red-Green C Industrial Scientific Professional Medical Supplies Examination Supplies Consumabl Ishihara Color Plate Test Ranking integrated 1st place 14 Vision Red-Green for C geekpastor.com,for,Plate,,Vision,Test,14,Ishihara,Test,,/gabelled907928.html,Industrial Scientific , Professional Medical Supplies , Examination Supplies Consumabl,$139,Color,C,Plate,Red-Green $139 Ishihara Color Plate Test, 14 Plate, Vision Test for Red-Green C Industrial Scientific Professional Medical Supplies Examination Supplies Consumabl

Ishihara Color Plate Test Ranking integrated 1st place Japan Maker New 14 Vision Red-Green for C

Ishihara Color Plate Test, 14 Plate, Vision Test for Red-Green C

$139

Ishihara Color Plate Test, 14 Plate, Vision Test for Red-Green C

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Product description

The Ishihara 14 plate Color Test is a test for red-green color deficiencies. It was named after its designer, Dr. Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917. The test consists of a number of colored plates, called Ishihara plates, each of which contain a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number visible to those with normal color vision and invisible, or difficult to see, for those with a red-green color vision defect. The full test consists of 38 plates (Cat. No. 2614), but the existence of a deficiency is usually clear after a few plates. Testing the first 24 plates (Cat. No. 2613) gives a more accurate diagnosis of the severity of the color vision defect. Common plates include a circle of dots in shades of green and light blues with a figure differentiated in shades of brown, or a circle of dots in shades of red, orange and yellow with a figure in shades of green; the first testing for protanopia and the second for deuteranopia.

Ishihara Color Plate Test, 14 Plate, Vision Test for Red-Green C

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