A woman from China has gone partially blind, after spending an entire day playing a game on her smartphone. The 21-year-old, who goes under the pseudonym Wu Xiaojing, was a hardcore fan of popular multiplayer smartphone game Honour of Kings. Wu, who works in finance, was said to have been playing the game for several hours when she suddenly lost her sight in her right eye. She was taken to several hospitals and was diagnosed with Retinal Artery Occlusion (RAO) in her right eye.