According to dr. Bates, if a person uses glasses, he will not improve vision, but on the contrary, there may be a deterioration of vision and the use of thicker glasses prescribed by the doctor. One of the assumptions of dr. Bates’ thesis was that visual acuity varies depending on a person’s physical and emotional state. Bad habits related to the use of the eyes are closely related to their tension and stress. Dr. Bates found that relaxation techniques could reduce stress. The use of relaxation methods directly leads to improved vision.