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.
For UFAs (including Franchise players and Transition players), who have been given a tender offer from their prior team, the period officially ends on July 22 or the first day of training camp -- whichever is later. For more on the entire timeline for Free Agency check out our Free Agency 101 page.