“…Carterette and Symmes (1952) first reported that red flicker provoked an increased photo-convulsive response (PCR) relative to other wavelengths. Since then, this finding has been reported by Bickford (1953) ;Marshall, Walker, and Livingston (1953); Pantelakis, Bower, and Jones (1962); Kojima, Suguro, and Miyamoto (1963); Brausch and Ferguson (1965) ;Harley, Baird, and Freedman (1967); Tsukahara (1972a, 1973). It has also been reported by Carterette and Symmes (1952); Brausch and Ferguson (1965); Buskirk, Casby, Passouant, and Schwab (1952); Marshall et al (1953); Bickford (1954); Asano and Umezaki (1965); Maruyama and Maruyama (1968); Takahashi and Tsukahara (1972b) and Harley et al (1967) that red removing eyeglasses or contact lenses afforded clinical relief to patients with photogenic epilepsy.…”