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Specification
Author : unknown author
Binding : unknown_binding
Brand : Grafco
BulletPoint1 : Complete eye coverage
BulletPoint2 : Soft sponge lining forms to the contours of the face and provides comfort
BulletPoint3 : Spring clip attaches to your glasses
BulletPoint4 : Designed for temporary use
BulletPoint5 : Small size is 35mm vertical and 55mm horizontal
Color : White
Department : unisex-adult
Hazmat : 9
ItemName : Grafco Ishihara Test Chart Books, for Color Deficiency-10 Plate Book (Unlettered Persons and Children)
ItemPackageDimensions_Height : 5.334 centimeters
ItemPackageDimensions_Length : 31.242 centimeters
ItemPackageDimensions_Width : 8.128 centimeters
ItemPackageQuantity : 1
ItemTypeKeyword : therapeutic-eye-charts
Manufacturer : GF Health
MaximumWeightRecommendation : 33 pounds
PartNumber : 1257-GFSKU
ProductDescription : 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. What, or even i
ProductSiteLaunchDate : 2014-02-06T03:57:55.681Z
TargetGender : male
UnitCount : 1