Watery Eyes

My girlfriend is suffering from streaming eyes every time we go riding. Combined with not being blessed with 20/20 vision this can lead to someone interesting riding at times. She uses wrap round glasses but they don't seem to make that much difference. Anyone have the same problem or an idea of what causes this and how to prevent it? Thanks,
Andy.
Andy.
Jamis Dakota Sport
Fuel EX 8
Fuel EX 8
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Fuel EX 8
Fuel EX 8
No pun intended
Fuel EX 8
We have a walk-in fridge and freezer at work and my eyes water going in them!!
They water so much that its almost like wearing incorrect contact lenses!
Glasses dont make much difference as stated, the only option would be DH or ski goggles.
The downside would be that body temps would rocket wearing goggles!!! :?