Blind spot in Google Glass

Significant scotomas, or blind spots, were found in all of the participants while they were wearing the head-mounted display systems, but not when wearing control frames of a similar colour and temple width. 

The University of California researchers called peripheral vision “essential for daily activities such as driving, pedestrian safety and sports” but noted that more than 10% of the visual field on the horizontal axis was lost by wearers of Google Glass.