The 3-D version of Avatar has two images projected on the screen, each image seen by one eye. The images are then merged into one by your brain. If the images aren’t perceived correctly, it will be very difficult to merge or fuse the images into 3-D. The technology behind the Avatar 3-D effects is based on the premise that the viewer has the ability to see 3-D or has good stereovision.
“There are a variety of vision problems which may cause difficulty in viewing 3-D Avatar. This may cause headaches or at the least make viewing very uncomfortable,” explained Dr. Farooq Ashraf, medical director of the Atlanta Vision Institute.
Research has shown that up to 56% of those 18 to 38 years of age have one or more problems with binocular vision and therefore could have difficulty seeing 3-D. In addition, about five percent of the population have amblyopia (lazy eye) and/or strabismus which makes 3-D viewing impossible.