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Readability is the ease in which text can be read and understood.
Various factors to measure readability have been used, such as " speed of perception ," " perceptibility at a distance ," " perceptibility in peripheral vision ," " visibility ," " the reflex blink technique ," " rate of work " ( e. g., speed of reading ), " eye movements ," and " fatigue in reading.

2.123 seconds.