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.
on April 13, 2015 at 1:00 PM, updated April 13, 2015 at 1:01 PM. We're now more than a month into the 2015 NFL league year, and six players whose contracts with the Jets expired last month remain free agents. One of them is Michael Vick, who just two years ago had been the Eagles' opening day starting quarterback. Vick had joined the Jets last year knowing his role would be to back up Geno Smith, whom the team wanted to develop.