Photophobia, or light sensitivity, is an intolerance of light. Sunlight, fluorescent lights, bright light, glare, and even headlights and lights at night can be bothersome; and discomfort may be reduced with Irlen Spectral Filters.
There are a variety of symptoms that can be caused by sensitivity to light including eye strain, fatigue, sleepiness, nausea, dizziness, anxiety, irritability, and discomfort. Lights may also be a trigger for headaches and migraines. Sometimes photophobia/light sensitivity is a symptom of a head injury (TBI), concussion, or whip lash or the result of underlying medical problems. These symptoms can also be eliminated by the Irlen Method.
The problem seems to be an inability for the brain to adjust to various levels of brightness. It is as if the brain was a radio and the volume control was broken so that it could not make adjustments to control loudness.