When Matt King first got on Facebook eight years ago, the blind engineer had to weigh whether it was worth spending an entire Saturday morning checking whether a friend of his was actually in his friend list.
Such were the tools at the time for the visually impaired - almost nonexistent.
A new face recognition service the social network is rolling out on Tuesday, King can now learn which friends are in photos, even those who haven't been tagged by another user.
The facial recognition technology, which uses artificially intelligent algorithms, doesn't appear to have changed much since Facebook began using it in 2010 to suggest the identities of people in photos. But after incorporating feedback from billions of user interactions, Facebook felt confident enough to push its use into new territory.
"What we're doing with AI is making it possible for anybody to enjoy the experience," says 52-year-old King, who lost his sight in college due to a degenerative eye disease and now works at Facebook as an accessibility specialist.
In addition to the improved facial recognition, Facebook has in recent years also automated descriptions of what's happening in a photo.
For the sighted, the new facial recognition settings will also help crack down on impostors. Starting Tuesday, Facebook will notify you if someone has uploaded your face as their profile picture.
If you don't want drunken karaoke picture of yourself online, for example, you can't veto the resulting photos posted by your friends, although you can ask them to take it down. Serious violations or disputes can be flagged to Facebook staff.
For the visually impaired, the company is also working on identifying text in manipulated photos like memes, though its technique isn't quite ready for primetime. Even small accuracy problems can ruin the punchline, according to Facebook accessibility director Jeff Wieland.
