Blurred vision after swimming is due to eye irritation. And what cause eye irritation? That is chlorine, air pollution or chemical exposure. However, it is a common problem experienced by those who swim in chlorinated pools. So, relax, you can flush them with clean water or eye drops, both of them can irritate tears washing out the chlorine. But if you wear contacts, remove them before wash your eyes or drop eye drops into your eyes, do not put the contacts back in your eyes, dispose of them even if you do not wear disposable contacts. In case that blurred vision will happen again in next swimming, you'd better wear goggles.