According to British eyeball charity The Eyecare Trust, more than one in ten Britons lack the ability to correctly view stereoscopic images, thanks to poor binocular vision, Edge reports.
"3-D technology relies on our eyes' ability to work together as a co-ordinated team to achieve an accurate perception of depth," claims the Eyecare Trust.
"However, more than one in ten of us (12%) has a visual impairment that means our brains are unable to correctly process the individual images that are transmitted to it via our left and right eyes. This leads to an inconsistency in viewing the three spatial dimensions (height, width and depth) required to enjoy 3D films in all their glory."
A similar problem rocked the optical illusion industry when it was revealed that one in five people "couldn't do" magic eye pictures.