For travelers with disabilities, video games are windows to the world

Valerie Johnson is an avid traveler who loves the outdoors. Next on her list is a trip to Walden Pond, in Massachusetts. But the 27-year-old Texan won't need a plane ticket; all she'll need is a video game. Johnson was recently diagnosed with idiopathic intracranial hypertension, a neurological disorder that can cause headaches, impaired vision, and joint pain. These symptoms make travel--particularly to the outdoors--daunting.