Who, indeed, could have supposed that a mere ocular defect could have given rise to so serious a train of evils….And who that had not seen it, could believe that the correction by glasses of the eye trouble could have given a relief so speedy and so perfect that the patient described it as a miracle?
Dr. S. Weir MitchellNeurologist and Headache Specialist Philadelphia, PA
Headaches and Eye Strain, April 1876