Amatul Rahmân Omer:
The lightning (being so intensely dazzling) may well-nigh snatch away their sight. As often as it flashes for them they walk (a few steps) in it (- its light), and when it darkens against them they come to a halt. Indeed, if Allâh had so willed He would have taken away their hearing and their sight. Allâh is indeed Possessor of power to do all that He will.