Legality and Regulation
International legislation concerning the legality of audience scanning varies greatly. The biggest point of contention is the method of calculating the level of exposure actually received. The MPE (maximum permissible exposure) is essentially the same throughout the world, but some countries are far more conservative in their estimations of the amount of light received by the eye. Audience scanning is not widely practiced in the United States; it is far more accepted in the United Kingdom, despite having been stopped for a period, and in the rest of Europe.
Read more about this topic: Audience Scanning
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