Which of the following is NOT a function of laser technology in medical practices?

The option indicating "Immediate healing of severe wounds" is not a function of laser technology in medical practices because lasers are primarily used for specific therapeutic effects such as targeting tissue, promoting healing over time, and improving various conditions, rather than providing instant healing. Medical lasers can aid in the wound healing process by stimulating collagen production and reducing scarring, but they do not magically heal severe wounds on the spot. In contrast, other functions such as reduction of hair follicles, skin tightening, and fat reduction leverage the precision and focus of laser technology to achieve gradual and effective results, addressing specific cosmetic and medical issues over a course of treatment rather than immediate outcomes.