Ishihara Test Chart Books, for Color Deficiency

by Graham Field

Product Features

• 1EA

Product Description

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. T

Product Details

• Shipping Weight: 1 pounds (View shipping rates and policies)
• ASIN: B000FLTPZU
• UPC: 717076043021
• Item model number: 1254
• Average Customer Review: 3.0 out of 5 stars  See all reviews (2 customer reviews)
• Amazon Best Sellers Rank: #75,057 in Health & Personal Care (See Top 100 in Health & Personal Care)

Customer Reviews

Most Helpful Customer Reviews

2 of 2 people found the following review helpful:

5.0 out of 5 stars Great Product, November 15, 2011

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T. Folkerts - See all my reviews
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This review is from: Ishihara Test Chart Books, for Color Deficiency (Health and Beauty)

I use this product in our clinic for color testing. It's very easy to use and interpret, and the slides are great quality. A must have for any primary care practice.

3 of 16 people found the following review helpful:

1.0 out of 5 stars cannot return the item, May 10, 2009

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Elli Guernsey - See all my reviews
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The item itself is fine, but is the wrong one for my purposes; HOWEVER, my complaint is with the seller. The seller WILL NOT return my requests to return the item.