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Liquid crystal glasses filter out epileptic-seizure-triggering light
People with photosensitive epilepsy could soon be able to watch TV without worry. Scientists in the UK have created glasses that can block out specific wavelengths of light known to cause seizures.
Flashing and alternating patterns, such as those in clubs, emergency vehicles, television, movies and video games, can all be triggers if they have just the right mix of brightness, frequency and wavelength. In this case, the frames of the glasses has a small circuit that heats the lenses up to 36.5 °C (97.7 °F), which causes them to reflect those particular wavelengths of red light. The idea there is that people could wear them out and about with normal vision most of the time, but could switch them on when they want to watch TV or play video games without worrying about having a reaction.
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