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.
The bottom line in all this is that the Vikings will need a third quarterback for part or all of the 2017 season, and they have one of two options to get one. They can either take one in the upcoming draft, or they can sign a free agent. And when Mike Zimmer spoke to the press during the Owner's Meeting recently, he seemed to indicate that the Vikings were going to be signing a free agent soon: Zimmer on backup QB plans: I'm sure we're going to get something done there..