Eyeglasses are the oldest and most common vision correction option. There are several options for correcting refractive errors such as myopia or nearsightednes, hyperopia or farsightedness, astigmatism and presbyopia.
Migraine headache is caused by enlargement of blood vessels that causes the release of chemicals from nerve fibers that coil around the large arteries of the brain.
Migraine headache is continuous headache.