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 Unrestricted Free Agents who have received the June 1 tender from their prior club, from March 12 to July 22 (or the first scheduled day of the first NFL training camp, whichever is later). For Franchise Players, from March 12 until the Tuesday following the 10th week of the regular season, November 12.