Eye chart smaller symbols until the person cannot identify the symbols. The smallest symbols that can be reliably identified is considered the person's visual acuity. The Snellen chart is the most widely used. Alternative types of eye charts include the logMAR chart, Landolt C, E chart, Lea test, Golovin–Sivtsev table, the Rosenbaum chart, and the Jaeger chart. Charts display several rows of optotypes, which are standardized symbols for testing vision. Optotypes are usually letters, numbers, or geometric symbols. Each row of the chart depicts optotypes of a different size. Typically the largest optotypes are in the top row. The optotypes become progressively
Chain Letters but the existing letters could not be rearranged. They won £5 for each valid word and could make up to four plays, for a maximum length of seven letters. If the contestant either chose to stop or created an invalid word, their turn ended. A five-letter word was displayed, with a plus sign at the left end and a minus sign at the right. The host read a toss-up clue whose answer differed from the displayed word by one letter. The change that needed to be made was displayed when a contestant buzzed-in. If a letter was highlighted, it needed