Many people complain of headache and uneasiness when watching 3-D movies.
If you are one of them, Hank Green an inventor has a special pair of glasses for you.
Mr Green hit upon the novel idea that one could easily convert 3-D video into 2-D by simply blocking light from one of the two overlapping images.
When his wife confessed that she gets headaches when watching 3D movies, the happy-to-help Mr Green repurposed the 3D glasses by swapping polarising filters and created the world’s first 2D glasses.
Mr Green’ 2-D glasses look like 3-D glasses, only they have the same polarization in each lens, which effectively strips away the 3-D and leaves a 2-D image for you to enjoy without developing a headache. You can buy a pair of these glasses for $8.