Jon Tangerine / silo / typography / Rendering test for display sizes

Georgia Heading Example at 36px

As exprienced readers read, their eyes spring jerkily along the lines. These brief moments are known as saccades, and they alternate with fixed periods lasting 0.2–0.4 seconds. A line is perceived in a series of saccades, followed by a large saccade as the eye jumps back to the left to start a the next line. Information is only absorbed during the fixed period. With average type size, as used for books, a saccade represents 5–10 letters, or about 1–2 words in English. A saccade may begin or end with a word.