References
- von Noorden GK, Maumenee AE: Atlas of Strabismus. St. Louis, CV Mosby Co, 1967, pp 23–28.
- Cashell GTW, Durran IM: Handbook of Orthoptic Principles. Baltimore, Williams & Wilkins Co, Edinburgh and London, ES Livingstone, Ltd. 1967, pp 77–78.
- Lyle TK, Wybar C: Practical Orthoptics in the Treatment of Squint. Springfield, Ill, Charles C Thomas, 1967, pp 95, 185, 335–336, 533–534.
- Duke-Elder: System of Ophthalmology, vol VIII, Diseases of the Outer Eye, Part I. St. Louis, CV Mosby Co, 1965. Henry Kimpton, London, 1965, pp 517–522.
- Geerates WJ: Ocular Syndromes, ed 2. Philadelphia, Lea & Febiger, 1969, p 185.
- Scheie HG, Albert DM: Adler's Textbook of Ophthalmology. Philadelphia, WB Saunders Co, 1969, p 230.