![]() The advantage of an optical device was that it solved a major issue with the ball mouse, where the ball would pick up dirt, grease, and fluff and gradually lose functionality over time (although they could be cleaned, of course - never a particularly pleasant task!). The optical mouse was developed in around 1980.The ball mouse was such an iconic design, that it dominated the market for many years.The motion could be converted into electrical pulses signifying direction and speed. The ball could detect movement in any direction thanks to interaction with two rollers that in turn spun wheels. ![]()
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