As Lifehacker’s smart glasses and virtual reality expert, I spend a lot of time flooding my eyes with bright light. Last night, I was testing a pair of soon-to-be released display style glasses that blast out 1,200 nits of light. That’s roughly car-headlight-bright, squeezed into a postage-stamp-sized image projected on glass about a half inch from my eyes. I thought to myself, “Wait, am I frying my eyeballs?”

So I called up Dr. Sunir Garg, a spokesperson for the American Academy of Ophthalmology and professor of ophthalmology at Wills Eye Hospital, and asked him point blank: What am I doing to my eyes with this stuff? “We think not much,” Garg replied. “If the light is not physically causing you to look away—if it’s a bright screen but it’s not uncomfortable—we don't think that that's go

See Full Page