Designed to prevent or reduce the tiredness and discomfort that comes from looking at something for too long.
From anti- (against) + eyestrain (eye + strain, from Middle English strein meaning to stretch). This is a modern compound term that emerged with industrial and digital technology that required extended visual focus.
The term became especially important in the last 30 years as screens multiplied in homes and offices; computer scientists and ophthalmologists now actively research antieyestrain technologies like blue light filters and special lens coatings because so many people spend 8+ hours daily staring at glowing rectangles.
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