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By Graham Field
MSRP $288.77 You Save $118.90
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10 Plate Book (Unlettered Persons and Children)
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 if, a number is visible indicates if and what form of color blindness the viewer has. The full test consists of thirty-eight plates, but the existence of a deficiency is usually clear after fewer plates. The Ishihara Color Charts are accepted by leading authorities worldwide as a simple and accurate test method.
- The color plates are available in an album-type book for ease of handling. The books are printed in Japan and are protected by international copyright. Graham-Field has been the exclusive North American wholesale distributor of Ishihara Tests for over 30 years.
Features/Benefits:
- 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
- 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 if, a number is visible indicates if and what form of color blindness the viewer has
- The full test consists of thirty-eight plates, but the existence of a deficiency may be clear after fewer plates
- Color plates encased in specially designed album-type books for ease of handling
- Detailed instructions included
SKU: 717076043205
Shipping Weight: 3 ounces
Shipping Dimensions: 8.01" x 5.89" x 0.57" (L x W x H) inches
$20.95 Flat Rate GND (1-5 BUS DAYS) in continental USA. Residential fees will occur is a lift gate is required. Exclusions may apply.
25% restock fee (min. of $12.00), 10% admin fee. Shipping is paid by the customer. Original packaging. No returns after 30 days. No Cancellations; No Returns on PPE, Personal Items or PPE-related products; All Sales Final. Not all products are eligible for returns. Exclusions apply. Please refer to the "Restrictions" tab on the products listing page, i.e. where stated "Non-Returnable Item". All returns must be approved by our Returns Department. An e-mail notification will be issued regarding your return status and return instructions, should this apply. Any product returned for credit without an authorized RMA number clearly printed on the outside package or shipping label will be refused. Unauthorized returns will not be honored or accepted for credit. Please note pictures/descriptions are representative of the product class. Image may be product itself, or associated code related in it's class.
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Graham-Field:
Headquartered in Atlanta, GA, GF Health Products, Inc. ("Graham-Field") is one of the world's leading manufacturers and distributors of medical products in the health care industry, offering approximately 4,000 medical, rehabilitation, long-term care and homecare products.
Our offering is comprised of our quality brands such as Everest & Jennings, wheelchair and seating products; Lumex , ambulatory, bath safety, pressure management and specialty seating products; Basic American Medical Products, beds and institutional equipment; Hausted, patient handling, surgical stretchers, surgical chairs; John Bunn, respiratory equipment; Labtron , diagnostic equipment; Grafco, a line of exam treatment products, and Lumiscope, diagnostics, all names you have come to trust for their quality and design.
In addition to our headquarters in Atlanta, Graham-Field has distribution centers in Doraville, GA; St. Louis, MO; Edison, NJ; Los Angeles, CA; and Fond du Lac, WI. Our manufacturing facilities are located in various locations such as Fond du Lac, WI; Doraville, GA and Warwick, RI.
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