You didn't mention what type of screen you have, how tall it is and how tall you are. It sounds like the windshield is too tall. Most windshield manufacturers will agree that it is best to see over the windshiled. The screen should still force the flow of air either over your head or to the top of your helmet.
Personally, I couldn't stand to look through a windshield. Not only are there distortions, but riding in the rain could be much worse.
