raycast shooting lasers meeting at center of screen

i have two laser coming from the left and right of the screen i want them to shoot at the same spot as in all way meet at the same spot weather shooting faraway or very closes i dont want them crossing each other when shooting in to the distant and not meting on the target when closes could i have them target the gazes dot im shooting laser from my eyes at bugs so i need them to met at the target whether far or closes i dont know how to do this can any one help in any way