The disclosure relates to a type of virtual reality glasses used to alleviate a view's feeling of fatigue when he or she wears virtual reality glasses for viewing. The virtual reality glasses comprise a housing, a display device, and an optical imaging device disposed within the housing. The optical imaging device is located between the display device and the human eyes. In addition, the virtual reality glasses further comprise a dimming device disposed on the housing wall. When the viewer feels tired after a long time watch through the virtual reality glasses, the viewer may control the dimming device to adjust the ambient light in the virtual reality glasses to improve the background environment inside the virtual reality glasses, thereby alleviating the viewer's feeling of fatigue resulted from viewing through virtual reality glasses worn by him or her.