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.
Players who weren't tagged by 4 p.m. ET on March 1 are headed to NFL free agency. March 7 is the beginning of the legal tampering period of free agency, when teams can begin negotiating with representatives of free agents to the point of agreeing to terms.