Definitely worth a pair of really good riding glasses. If your probelem is really severe, then you need to get something that really fits tightly around your face, and keeps all outside wind out.
Fortunately, these days that's the style for sunglasses anyway. If the budget is tight, start looking at safety glasses at a hardware or building supply store. They will have the over the glasses ones I have to use, but they will also have many other choices that look good. The safety designs tend to fit tight, so as to keep metal bits and sawdust out of workers eyes, and should also keep pollen wind off your face.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.