Today on the First 40 Miles, BLINK: The Eye Episode.  Most of us rely on our sight to help us navigate the trail, which means that eye health is a critical part of backpacking. Today’s episode focuses on eye health basics and how to care for your eyes while backpacking.  And we’ll be swapping out our SUMMIT Gear Review for a SUMMIT Film Review.  For today’s Backpack Hack of the Week, Josh shares his tips for using contact lenses while backpacking.  And we’ll wrap up the show with a little trail wisdom from our good friend on the trail, Helen Keller.