Reading while flat on your back's difficult. You need to either prop up your head or hold the book awkwardly above your face. Why go through that when you can use these glasses to "bend your vision" and remain supine?
Sold by Hammacher Schlemmer, the Supine Reading Glasses use "two optical-quality glass prisms that bend your vision 90º" so that you can be even lazier for a mere $US50. [Hammacher via CrunchGear via Fashionably Geek]