Why is Deadpool able to fire and control lasers?

In X-Men Origins, Scott Summers lost his eyes, which were then put into Deadpool. After this event, in X-Men 1 through X-Men 3 Scott was still able to fire lasers, implying that the mutant ability was not related to the eyes? Yet Deadpool was able to fire the lasers with Scott's eyes. In addition Deadpool was able to control if he shot the beam, whereas Cyclops had to keep his eyes closed or adjust his visor.

Why is Deadpool able to shoot lasers with eyes and Cyclops without? Why is Deadpool able to control the lasers without the technology Cyclops has?