CO2 fractional laser theory bụ nke United States Harvard bu ụzọ bipụta ya.Ọkachamara ọgwụ laser nke Mahadum Dr. Rox Anderson, wee nweta ndị ọkachamara n'ụwa niile kwenyere na ọgwụgwọ ụlọ ọgwụ ozugbo.CO2 fractional laser wavelength bụ 10600nm, ojiji nke nhọrọ photothermal decomposition ụkpụrụ, ọbụna na akpụkpọ akara nke ọma oghere, na-eme ka akpụkpọ oyi akwa nke na-ekpo ọkụ n'ikuku, thermal coagulation, thermal mmetụta.Na mgbe ahụ mee ka usoro mmeghachi omume biochemical akpụkpọ ahụ na-akpali anụ ahụ maka imezi onwe ya, ka ọ wee nweta ike, rejuvenation na kpochapụ mmetụta nke stains.