Wicked Lasers | Blue, Red, Green Laser Pointers
Just to show what can be purchased around the world and these aren't the worst by a long way. Just look in the tech market of Shanghai for some of the 'under the counter' stuff.
As far as 'decision making' goes any flight crew incapacitation requires a diversion. The time frame and decision making processes will obviously vary with the extent of the injury etc.
The MINIMUM number of crew for operation of a trans atlantic passenger jet is two. Any reduction below the minimum requires an emergency declaration and a diversion. If that diversion is back to the departure airfield then so be it.
To continue over the pond with below minimum crew would be illegal as well as not a bit stupid. If the crew member felt that their ability to carry out their assigned tasks as PF or PM had been degraded by the incident, irrespective of the time frame, severity or damage, then the aircraft is operating below minimum crew and the absolutely correct command decisions were taken.
It's very easy to hypothesize when you are not conversant with the rules and regs of the ANO but perhaps it would be best not to wrap that lack of knowledge up in an arm chair warrior irrelevant post.
Just my thoughts