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.
A contractual tool in the NFL that allows teams to keep a pending unrestricted free agent on the team for an additional year. Teams are allowed to place a Franchise Tag on only one player per year, which provides the player with a guaranteed contract with a salary similar to the salaries of the top 5 in the NFL for that position.