Google Glass May Cause 'Blind Spots' While Driving
Wearing Google Glass may partially obstruct peripheral vision, causing blind spots that could interfere with daily tasks such as driving, a new study has found.
Peripheral visual field is a main component of vision and essential for daily activities such as driving, pedestrian safety and sports. Conventional spectacle frames can reduce visual field, sometimes causing absolute blind spots, and head- mounted devices have even more pronounced frames, researchers said.
Tsontcho Ianchulev of the University of California, San Francisco, and colleagues compared performance on visual field tests with a head-mounted device vs regular eyewear to quantify their effect on visual function. Three healthy individuals with 20/20 best-corrected visual acuity and normal baseline visual fields were tested in April 2014.
Participants used a wearable device (Google Glass, Google Inc), following manufacturer's instructions, for a 60-minute acclimation period. Perimetric visual testing (a measurement of the field of vision) was conducted first with the device, followed by a control frame (regular eyewear) of similar colour and temple width. In addition, to assess how the devices are worn by general consumers, photographs of people wearing the product and facing the camera, obtained from an Internet search, were analysed. Photographs were assessed for prism position relative to the pupil.