Iris photography Photo: CCTV

Iris photography has emerged as a popular trend among youngsters, with many netizens and vendors posting related photos online, according to a report from China Youth Daily on Wednesday. However, experts cautioned that the new trend should be approached with care from both a legal and health perspective.

The process of capturing iris photographs is similar to eye exams conducted in hospitals. Individuals rest their chins on a tray while strong lights on either side illuminate their pupils. A camera positioned directly in front then takes a close-up shot of the iris, producing a unique image of the person's iris.

However, there are also concerns about the safety. "The iris, like a fingerprint, contains unique personal information through its texture," said Xu Ming, a professor at the college of cybersecurity at Hangzhou Dianzi University. 

Also, it is recommended to avoid strong light as much as possible and not to stare at light sources while taking photos, said Yu Pingping, director of the ophthalmology department at the Second Affiliated Hospital of Zhejiang University School of Medicine.

China Youth Daily-Global Times