Smith CF, Vangsness CT, Anderson T & Good W (1995) Univ. of Southern California School of Medicine (USA), General Motors (USA) The International Society for Optical Engineering (SPIE) Proceedings SPIE (1995) 2395; 658-661. A randomized, double-blind study was initiated in 1990 to evaluate an eight-point conservative treatment program in carpal tunnel syndrome. 160 patients were delineated with symptoms of carpal tunnel syndrome and these patients were then divided into two groups. Both groups were subjected to an ergonomically correct eight-point work modification program. A counterfeit LLLT unit was used in Group A, while an actual LLLT unit was used in Group B. Groups A and B were statistically significantly different in terms of return to work, conduction study improvement, and certain range of motion.