Check the listing for details. Ishihara Test Chart Books for Color Deficiency. Color: Blue, Condition: New. Listed at 34.28 USD. Exclusive Offers Await!Welcome to our stores! Satisfaction is what we guarantee. Ishihara Test Chart Books for Color Deficiency Product Overview Test Chart Books Features: 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. Consist 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. The Ishihara Color charts are accepted by leading authorities worldwide as a simple and accurate test method. 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 misconcepti Key Features Grafco Ishihara Test Chart Book Package Info: Each Includes four special plates for tests to determine the kind and degree of defect in color vision. Image may not reflect actual product sold. Please read description carefully. GHF1254 Payment Information ★ Secure payments through eBay. ★ We accept PayPal and all major credit cards. ★ Immediate payment required upon purchase. ★ For any payment issues, please contact our support team. Shipping Information ★ Orders are shipped to the address provided during checkout. Please verify your address. ★ We process orders within 1 business day (excluding weekends and holidays). ★ Standard delivery time is 3-5 business days. ★ We use trusted carriers like UPS, FedEx, and USPS. ★ Shipping is only available within the contiguous United States. No shipping to Alaska, Hawaii, Puerto Rico, or PO Boxes. ★ If there are any shipping delays, please contact us for support. Return Policy ★ We offer a 30-day return policy. ★ If you are not satisfied with your purchase, you can return it within 30 days for a full refund. ★ Please contact us to obtain the return address before sending back any items. ★ Items must be returned in their original condition and packaging.