This is a common problem for snwoboarders. Unlike skiers, we have to turn our heads to either side to look in the direction we are going downhill. This causes the nose area to come into the field of vision of the eye that is opposite of downhill.
Since you are always going to see your own nose, goggles with a lot of plastic around the nose area makes it much worse. There are goggles out there with less plastic around the nose for this exact reason. I rock the Oakley Splices which were specifically designed for snowboarders to combat this issue:
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