Ishihara S Test Chart Book

Author by : Dr Shinobu Ishihara
Languange : en
Publisher by : The memory Guru of India, 123 D, Pardevanpur, Kanpur-208007 India
Format Available : PDF, ePub, Mobi
Total Read : 71
Total Download : 349
File Size : 43,6 Mb
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Description : COLORBLINDNESS/COLOURBLINDNESS/COLOR BLINDNESS/COLOUR BLINDNESS/ 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 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 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 supplying the healthcare market with one of the broadest selections of high quality healthcare products and services. All of their products have been designed with a single objective - to enhance the quality of life of the people that use their products and their caregivers.Their brands, such as Everest & Jennings and LaBac, Lumex, Labtron, Grafco, Smith & Davis and Simmons-offer the quality and value you've come to trust. Recent Tags: Exam Room Equipment > Vision Testing > Color Vision Tests, 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 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 supplying the healthcare market with one of the broadest selections of high quality healthcare products and services. All of their products have been designed with a single objective - to enhance the quality of life of the people that use their products and their caregivers.Their brands, such as Everest & Jennings and LaBac, Lumex, Labtron, Grafco, Smith & Davis and Simmons-offer the quality and value you've come to trust., Ishihara Test Chart Book, for Color Deficiency, 38 Plate Book


Diagnosis Of Defective Colour Vision

Author by : Jennifer Birch
Languange : en
Publisher by : Butterworth-Heinemann Medical
Format Available : PDF, ePub, Mobi
Total Read : 22
Total Download : 285
File Size : 42,5 Mb
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Description : Completely updated and revised, this practical book continues to provide clear and succinct information about colour defiency and all aspects of colour vision testing.


Colour Vision

Author by : Sir William de Wiveleslie Abney
Languange : en
Publisher by :
Format Available : PDF, ePub, Mobi
Total Read : 20
Total Download : 532
File Size : 54,8 Mb
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Description :


Basic Vision

Author by : Robert Snowden
Languange : en
Publisher by : Oxford University Press
Format Available : PDF, ePub, Mobi
Total Read : 80
Total Download : 894
File Size : 53,7 Mb
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Description : Basic Vision: An Introduction to Visual Perception demystifies the processes through which we see the world. Written by three authors with over 80 years of research and undergraduate teaching experience between them, it leads the reader through the intricacies of visual processing, with full-colour illustrations on nearly every page.


Researches On Colour Blindness With A Supplement On The Danger Attending The Present System Of Railway And Marine Coloured Signals

Author by : George Wilson
Languange : en
Publisher by : Theclassics.Us
Format Available : PDF, ePub, Mobi
Total Read : 66
Total Download : 805
File Size : 47,9 Mb
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Description : This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1855 edition. Excerpt: ... in this section, and the confusion of red petals with green leaves, to which the author has referred, as proving the obscurity of red to Mr Troughton's eyes, is so nearly universal among the colour-blind, that I may. thus far adduce Sir David as at one with me in regarding red as appearing dark or darkish when seen by them. He holds, however, also, it will be seen, the remarkable opinion that the red light of the spectrum may appear much brighter, instead of much darker, to a colour-blind eye than to a normal one, in consequence of the former not perceiving the red, but instead thereof, yellow light of the same refrangibility, which makes a much stronger impression upon the retina. Additional observations can alone determine whether the anticipated phenomenon ever occurs. Its occurrence, however, would not be at variance with the appearance of red or crimson bodies as black to a colour-blind eye, as they do not transmit or reflect yellow rays to affect the retina. It is otherwise with scarlet bodies, which should appear as bright yellow to eyes which simply ignored red. But it is with green, not with yellow, that scarlet is systematically confounded by the colour-blind, as a review of all the recorded cases will fully demonstrate, and the green thus identified with scarlet is not a pale or yellowish green, but a full, and often dark, shade of that colour. Thus, Dalton compared sealing wax to one side of a laurel leaf, and a red wafer to the other, and his doctor's scarlet gown to the leaves of trees; nor was his case in this respect peculiar, for the colourblind are constantly found unable to distinguish the petals of the scarlet geranium from its leaves, the flowers of the wild poppy from the unripe corn amongst which it is growing, and...


Colour Physics For Industry

Author by : Roderick McDonald
Languange : en
Publisher by :
Format Available : PDF, ePub, Mobi
Total Read : 47
Total Download : 449
File Size : 49,6 Mb
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Description :


Introduction To Light

Author by : Gary Waldman
Languange : en
Publisher by : Courier Corporation
Format Available : PDF, ePub, Mobi
Total Read : 49
Total Download : 930
File Size : 52,7 Mb
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Description : Designed for a nonmathematical undergraduate optics course addressed to art majors, this four-part treatment discusses the nature and manipulation of light, vision, and color. Questions at the end of each chapter help test comprehension of material, which is almost completely presented in a nonmathematical manner. 170 black-and-white illustrations. 1983 edition.