The Royal College of Opthalmologists and the Association of Optometrists and opticians have announced that, while there is (as of yet) no proof that 3D TV causes long term damage, short term signs of injury have been spotted. (via TechEye) Research has shown that some people with underlying muscular weaknesses in their eyes are likely to experience headaches, eyestrain, and even double vision.
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The effects seen so far have only been temporary, but not all opticians agree about the lack of long-term dangers. Some believe that further research still needs to be done, and recommend that children under the age of 8 not be exposed to 3D. In addition, roughly 2-3% of the population simply cannot see 3D due to a pre-existing eye problem.
These worries are hardly the final nail in 3D's coffin, but they do represent a challenge to men like James Cameron who see the future in 3D. Two-dimensional movies and TV shows may not be as eye-popping, but the entirety of the audience can enjoy them without strain or headaches. In the end, it may be medical concerns that stop 3D from achieving ubiquity.