I have the XD-4 with the pinlock installed on the clear shield. I wear sunglasses under and have no problem with daytime vision. And at night, I simply take the sunglasses off. If I am offroad and require maximum ventilation, I simply remove the shield and put on goggles. This is a fantastic helmet with great ventilation for all conditions and it fits so comfortably. Yes, expensive. Isn't my brain worth it?