When you participate in outdoor swimming this visibility can be one of the trouble, especialy for the bright light. It is hard to see clear the water around more than others you have to deal with the reflection of the sun off the water. So you have to choose a special made or swim goggles which can block sunlight and can increase line of sight with a low profile so you can experience less resistance. You can take a look at the Speed Socket Mirror Swim Goggles, Speed Socket Polarized Goggles and Vanquisher 2.0 Plus Goggles.