why do you get a headache if you use the computer and watch tv too much?

Answer 1

Bright light causes constriction of pupil,increase in the curvature of lens(becomes more convex),increases secretion of tear glands,and slightly heats up cornea. This causes reflex head aches. Wearig photo sun or slightly tainted glasses prevents it.

Answer 2

because it takes alot of mental focus and energy to watch something continuously for hours at a time. Also, you are keeping your eyes on focus on one thing. That also will make your eyes tired, hence give you a headache, neckache, etc.. So take a break every half hour and take a walk. It will do u some good actually...

Answer 3

Headaches are often reactions to certain factors. Common triggers include dietary factors (e.g., alcohol, caffeine, chocolate), hormonal changes (e.g., menstruation, pregnancy, menopause, birth control pills, hormone replacement therapy), sensory stimulus (e.g., bright lights, loud noises, certain odors), emotions (e.g., stress, depression, anxiety) and uncorrected farsighted or nearsighted vision.

Although the cause of many headaches is unclear, researchers have identified a number of causes and potential causes, including contractions of muscles and dilation of blood vessels. In addition to pain, headaches may be accompanied by a number of other signs and symptoms including nausea, vomiting, fatigue and sensitivity to light or sound.

Answer 4

Also possible that you're squinting... that always gives me a headache.

Answer 5

yeep its called eyestrain