3-D blockbusters can cause headaches/eyestrain
something us O.D.'s have known for quite some time but some of the general public is just now figuring out: 3D can hurt your head. it doesn't "damage" your eyes or vision or anything, but for some people it can be an unpleasant experience:
ARTICLE ABOUT 3D MOVIE EYESTRAIN
all 3D movies work in basically the same way: the right eye sees a different image than the left eye. well that only works if:
a) the right & left images are both clear
b) the right & left images are the same size as each other (ballpark same Rx)
c) your brain is "paying attention" to both images (no "suppression")
d) your brain can "fuse" the separate images into one
e) both eyes are able to accurately point the correct direction (converge/diverge)
a lot of assumptions there. i guesstimate that conservatively 10-15% of the general populous can't get the effect at all or it gives them a monster headache to do it. heck 5+% of the population has refractive amblyopia and absolutely cannot do it at all, so the number of people who have an unpleasant experience with 3D movies could be much higher than 10-15%.
good thing you can usually see the films in 2D. cheaper that way, anyway.
current blockbuster 3D films:
AVATAR
HOW TO TRAIN YOUR DRAGON
CLASH OF THE TITANS
ARTICLE ABOUT 3D MOVIE EYESTRAIN
all 3D movies work in basically the same way: the right eye sees a different image than the left eye. well that only works if:
a) the right & left images are both clear
b) the right & left images are the same size as each other (ballpark same Rx)
c) your brain is "paying attention" to both images (no "suppression")
d) your brain can "fuse" the separate images into one
e) both eyes are able to accurately point the correct direction (converge/diverge)
a lot of assumptions there. i guesstimate that conservatively 10-15% of the general populous can't get the effect at all or it gives them a monster headache to do it. heck 5+% of the population has refractive amblyopia and absolutely cannot do it at all, so the number of people who have an unpleasant experience with 3D movies could be much higher than 10-15%.
good thing you can usually see the films in 2D. cheaper that way, anyway.
current blockbuster 3D films:
AVATAR
HOW TO TRAIN YOUR DRAGON
CLASH OF THE TITANS
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