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.
If the NFL has its own league, it would focus on young players, not veteran free agents. NFL teams are not allowed to allocate players to the development league debuting in 2017. The spring league's business model will follow a formula created in 2014 in the Fall Experimental Football League (FXFL).