1. 1. Hubel DH Wiesel TN. Receptive fields and functional architecture of monkey striate cortex. J Physiol. 1968; 195: 2 15- 243.
2. 2. Tychaen L. Binocular vision. In: Hart WM ed.Adler's Physiology of the Eye: Clinical Applications 9th ed. St Louis Mo: CV Mosby; 1992:773853.
3. 3. Worth C. Squint: Its Causes Pathology and Treatment. Philadelphia Pa: Blakiston; 1903.
4. 4. Chavasse FB. Worth's Squint or the Binocular Reflexes and the Treatment of Strabismus 7th ed. London: Bailliers Tindall & Cox; 1939.
5. 5. Tschermak I. Ueber physiologische u pathologische. Anpassung d Auges. Leipzig; 1900.