There are countless color blind tests in the world, including some very common and scientifically based. Some of these are also used by opticians to determine the nature and extent of color blindness. These are the standard red-green, lshihara, and Lantern tests. In addition to these, there are countless color blind tests. These are developed by Colorlite, which also have a serious scientific background behind them. On the recommended website, about a dozen tests for the color blind are available, which give serious, reliable results for the color blind.