Visual stress is a visual perceptual processing condition that affects how visual information is interpreted by the brain and interferes with reading, attention, coordination, general health and behaviour. This is different from problems involving sight or sharpness of vision and can occur despite normal vision. Classic symptoms include light sensitivity, headaches from reading, and problems reading because the white “page appears too bright” or the words appear to be "moving, flashing, or jumping on the page". As reading is such a key skill for school and life in general, problems with reading can thus lead to significant impairment. The good news is that appropriate intervention can make a significant improvement and for many individuals, one of the interventions is as simple as specific colour filters.