I get exercise induced headaches a lot! First when I played volleyball... now with riding... Man, they are awful, awful, so I feel for you.

What I find helps is loading up on electrolytes. Emergen-C (the regular version) helps also - I'll have two the night before a big ride, and one after. This is in addition to an electrolyte supplement on the bike. With this routine, I don't get a headache.

Speaking of eyes - easy question - are you wearing sunglasses?