Visual disparities in 3-D TV images can cause physical strain in viewers, according to recent research at the University of California at Berkeley. While proper viewing conditions can help avoid most problems--dark room, central seat far from the screen--3-D cinematographers also need to follow careful rules or risk making people sick, researchers said. The debate over 3-D TV heated up earlier this week when Samsung issued a warning about possible health effects. While proper viewing conditions can help avoid most problems--dark room, central seat far from the screen--3-D cinematographers also need to follow careful rules or risk making people sick, researchers said. Even if the physical strains of 3-D are avoided, other disparities can cause mental strain akin to vertigo, according to other investigators at the University of Washington.
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