Dr. Carl Hillier of San Diego - an expert eye doctor - explains why some people can't see 3D in the 3D movies and why their discomfort probably means that they might have undetected eye problems, such as lazy eye, stereo blindness, strabismus, convergence eyes problems, etc. Find an expert optometrist at optometrists.org/findeyedoctordirectory. Find Dr. Carl Hiller, FCOVD at sandiegocenterforvisioncare.com.