Eye chart number). The denominator indicates the distance in feet at which a person with normal vision could stand to correctly identify the same symbols identified by the person tested. For example, a visual acuity of 20/20 is considered normal. Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision. There is often also a need to test a subject's vision at near or occupational tasks (such as reading or computer use). For these situations, a Rosenbaum
Word chain Words (Russian: слова). Writing poetry following the same principle is called "capping verses." Various other variants exist, such as Ancient Greek skolion. Word chain Word chain, also known as Grab on Behind, Last and First, Alpha and Omega, and The Name Game. is a word game in which players come up with words that begin with the letter or letters that the previous word ended with. A category of words is usually chosen, there is a time limit such as five seconds, and words may not be repeated in the same game. An example chain for food would be: Soup