In 3-D movies , glasses help the brain fuse two images , creating the illusion of depth . More commonly , people may experience dizziness or other discomfort after watching something in 3-D , including a feature film . Symptoms of nausea , headache and fatigue may result when eyes move unnaturally . Comment:
In 3-D movies , glasses help the brain fuse two images , creating the illusion of depth . Symptoms of nausea , headache and fatigue may result when eyes move unnaturally . Comment: