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.
With the possible exception of the NFLâs first true free agent, Reggie White, there has not been a player like Peyton Manning available as a free agent in the history of the league. Teams have been proactive in extending their top players, especially franchise quarterbacks, long before the possibility of free agency.