Refraction and muscular imbalance, as simplified through the use of the ski-optometer
CHAPTER XI
THIRD METHOD OF TREATMENT—PRISM LENSES 84 When and How Employed 84 Prism Reduction Method 85
Refraction and muscular imbalance, as simplified through the use of the ski-optometer
THIRD METHOD OF TREATMENT—PRISM LENSES 84 When and How Employed 84 Prism Reduction Method 85