Long-term use of the computer can lead to development of a so-called "syndrome of computer vision". It is shown by such symptoms as temporary short-sightedness, dysfunction of eye muscles, decrease in sensitivity of sight, burning in eyes and others.
However there are factors reducing adverse operation of the computer on eyes. For example, use of the correct computer font. Scientists came to a conclusion that when reading the texts typed by the Verdana font, eyes test the smallest tension. Feature of this font is the lack of notches of letters and their size increased at the expense of a line spacing.
Researchers consider the ideal size of a computer font - 10-12 points.
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