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Ishihara 0174 Test Chart Books, for Color Deficiency


Ishihara 0174 Test Chart Books, for Color Deficiency by Grafco at Moment Info. MPN: 1256. Hurry! Limited time offer. Offer valid only while supplies last. Ishihara® Test Chart Books, for Color Deficiency - 38 Plate Book Accepted by leading authorities as a simple and accurate method for discovering


Product Description

Ishihara® Test Chart Books, for Color Deficiency - 38 Plate Book 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 remarkably bright compared with red and green. Color plates encased in specially designed album-type books for ease of handling. Detailed instructions included. What is colorblindness? Color blindness (color vision deficiency) is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition. Red/Green color blindness is by far the most common (99%) form and causes problems in distinguishing reds and greens. Another color deficiency Blue/Yellow also exists, but is rare (1%) and there is no commonly available test for it. There is no treatment for color blindness, nor is it usually the cause of any significant disability. However, it can be very frustrating for individuals affected by it. Those who are not color blind seem to have the misconception that color blindness means that a color blind person sees only in black and white or shades of gray. While this sort of condition is possible, it is extremely rare. The Ishihara color test is a test for color blindness. It was named after its designer, Dr. Shinobu Ishihara (1879-1963), a professor at the University of Tokyo, who first published his tests in 1917. It makes use of the peculiarity that in red-green blindness, blue and yellow appear remarkably bright compared to red and green. It consists of a number of colored plates, on each plate is printed a circle made of many different sized dots of slightly different colors, spread in a random manner. Within the dot pattern, and differentiated only by color, is a number.

Additional Information

Manufacturer:GF Health Products
Brand:Grafco
Color:green
Model:1256
Part Number:1256
Publisher:GF Health Products
Studio:GF Health Products
MPN:1256
UPC:717076037990
EAN:0717076037990
Item Weight:1.15 pounds
Item Size:0 x 0 x 0 inches
Package Weight:1.35 pounds
Package Size:6.07 x 1.37 x 1.37 inches

Ishihara 0174 Test Chart Books, for Color Deficiency by Grafco

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Ishihara 0174 Test Chart Books, for Color Deficiency

Brand: Grafco
4.4 out of 5 stars with 148 reviews
Condition: New
Lead Time: 1 - 2 Business Days
Availability: In Stock
$100.00


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