Color vision is a function of cones of the retina. The most common test of color vision is the Ishihara pseudo-isochromatic color plate exam. It consists of a series of test plates with colored dots forming a number. The numbers are visible to individuals with normal color vision but appear differently or invisible to the individuals who are red green color deficient.
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Advantages: The chart is familiar Inexpensive, quick and easy to use and interpret Disadvantages: Snellen chart has only one 6/60 lette...
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Preferences: Similarly quantities of letters per line. Consistently separating amongst lines and letters. Uniform movement ...
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Don't take your eyes for granted. Take these easy steps to keep your peepers healthy.
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