Apple is working on a wearable glass headset that displays various images and may use augmented reality. The wearable device is predicted to be similar to Google Glass, which shows information and images of objects in the wearer's field of vision. If Apple expands into smart glasses, the device is predicted to hit the market only in 2018, according to a Bloomberg report. The company has ordered some near-eye displays for testing but has not made any conclusions about production, the report said.