Lasers can cause damage in biological tissues, both to the eye and to the skin, due to several mechanisms. Thermal damage, or burn, occurs when tissues are heated to the point where denaturation of proteins occurs. Another mechanism is photochemical damage, where light triggers chemical reactions in tissue.
March 9: Teams are allowed to begin negotiating with other teamsâ players who are set to become unrestricted free agents at the end of the league year. This is the first time the NFL is providing a window to negotiate with other teamsâ free agents prior to the start of free agency.
The objective, sources said, is to have a completed deal ready to present to the executive negotiating committees for both sides Wednesday. The players and owners have scheduled separate electronic votes Thursday, keeping the league on course for Friday's targeted start of training camp and free agency. Sources told Bucher that big-name free agents such Nene, Tyson Chandler and David West aren't expected to be close to signing Friday.