Visual Snow (neurological)
Some people experience continuous "static" across their vision, plus halos, afterimages, trails, and sudden light sensitivity flashes. This is not a mental illness but a neurological visual disturbance that can be permanently present at all waking hours.
Try reading this
Visual snow makes it hard to focus on text, especially against bright or high-contrast backgrounds. The static is always there. Letters shimmer, edges split into colour fringes, and the page seems to vibrate faintly even in a completely quiet room.
Halos appear around bright objects. Afterimages linger seconds after looking away. A sudden glance at a window can trigger a painful white flash that takes several seconds to clear.
"It looks like the TV static you see when a channel is not tuned — but it never turns off."