The Cure of Imperfect Sight by Treatment Without Glasses by William Horatio Bates. A brilliant book written by an eye-surgeon for the masses.
William Horatio Bates (1860-1931) was an American physician who practiced ophthalmology and developed what became known as the Bates Method for better eyesight, a method intended to improve vision by undoing a supposed habitual strain to see. The book contains findings after decades of research and experimental work into various eye disorders. The author was amazed at his own discoveries and the effect they had for the treatment of defective vision.