You can do this, but it's not advisable. For one thing, if you open your eyes while underwater, you're contacts are gone. I've worn goggles and contacts and have been able to look around underwater. In my view, it's best not to wear contacts unless you're going to wear goggles because even if you plan not to open your eyes underwater, something could startle you and suddenly your contacts will just leave. Now, if you wear thoe one a day contacts (or even the 2 week contacts), then it's probably worth the risk.