Reading in Bed Without Pillows
Hamblin glasses were designed in 1936 to make it easier for people to read in bed. The periscope-like invention used mirrors that allowed wearers to see at a 45° angle so that they could lie on their backs and read without having to strain their necks. While this particular model never took off, numerous spinoffs of the same idea still exist and are available, for example, to enable the bedridden and fans of late-night TV to watch their favourite programs from the comfort of their beds.