Unicorn In Woods T-Shirt

This design is a simple unicorn in the woods, its also a cool colour blind test.... A unicorn (from Latin unus 'one' and cornu 'horn') is a mythological creature. Though the modern popular image of the unicorn is sometimes that of a horse differing only in the horn on its forehead, the traditional unicorn also has a billy-goat beard, a lion's tail, and cloven hooves—these distinguish it from a horse. Marianna Mayer has observed (The Unicorn and the Lake), "The unicorn is the only fabulous beast that does not seem to have been conceived out of human fears. In even the earliest references he is fierce yet good, selfless yet solitary, but always mysteriously beautiful. He could be captured only by unfair means, and his single horn was said to neutralise poison." The Ishihara Colour Test is a test for red-green colour deficiencies. It was named after its designer, Dr. Shinobu Ishihara, a professor at the of Tokyo, who first published his tests in 1917. The test consists of a number of coloured plates, called Ishihara plates, each of which contain a circle of dots appearing randomised in colour and size. Within the pattern are dots which form a number visible to those with normal colour vision and invisible, or difficult to see, for those with a red-green colour vision defect. The full test consists of 38 plates, but the existence of a deficiency is usually clear after a few plates. Testing the first 24 plates gives a more accurate diagnosis of the severity of the colour vision defect. Common plates include a circle of dots in shades of green and light blues with a figure differentiated in shades of brown, or a circle of dots in shades of red, orange and yellow with a figure in shades of green; the first testing for protanopia and the second for deuteranopia.