the lightning terrifies them as if it were going to snatch away their eyesight from them. when they see light they move on a little further and when it becomes dark for them they stand still. had allah so willed he could have deprived them totally of their hearing and their sight. most surely allah has power over everything.
يكاد البرق يخطف أبصارهم كلما أضاء لهم مشوا فيه وإذا أظلم عليهم قاموا ولو شاء الله لذهب بسمعهم وأبصارهم إن الله على كل شيء قدير