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.
After the Rozelle Rule was challenged and struck down (1976 in Mackey v. NFL), the NFL attempted what became known as Plan B free agency. This allowed owners to protect 37 of their playersâoften the best players and most potentially lucrative free agentsâwith the right of first refusal.