The Cure of Imperfect Sight by Treatment
Without Glasses - online book

The Original Bates Method, for correcting vision defects

	90 Cause and Cure of Errors of Refraction
			Patient reading fine print in a good light at thirteen inches, the object of vision being placed above the eye so as to be out of the line of the camera. Simultaneous retino-scopy indicated that the eye was focused at thirteen inches. The glass was used with the retinoscope to de termine the amount of the refraction.
	Fig. 34. Straining to See at the Near-Point Produces Hypermetropia
	When the room was darkened the patient failed to read the fine print at thirteen inches and the retino scope indicated that the eye was focused at a greater distance. When a conscious strain of considerable degree was made to see, the eye became hypermetropic.