The Cure of Imperfect Sight by Treatment Without Glasses
A well-known alternative healing method.
Versterking van de ogen. Een Systeem van Wetenschappelijke Oog Training
Strengthening the eyes. A System of Scientific Eye Training that has been translated into Dutch.
Strengthening The Eyes: A System of Scientific Eye Training
A complete program of exercises (and dietary improvements) to overcome the need for eyeglasses. Many photos.