Photosensitivity

An abnormal sensitivity to light that can cause discomfort, pain, or visual disturbance. Photosensitivity affects many people with visual impairments and certain neurological conditions including migraine and epilepsy. In digital accessibility, photosensitivity considerations include avoiding flashing content (WCAG Success Criterion 2.3.1), providing dark mode options, and allowing users to control brightness and contrast. In physical environments, photosensitivity can affect when and where people with low vision can safely perform activities, as alternating light and shadow or bright glare may significantly impair their remaining functional vision.