Sony BKM30GM (BKM-30GM) 3D circular micro-polariser glasses. These light, easy to wear passive circular polarising glasses are designed for use when viewing stereoscopic images on a compatible 3D monitor. They are optimised for the Sony LMD-3251MT and LMD-2451MT. Designed with a soft frame and centre-support structure, the glasses comfortably fit heads of any shape size, minimising wearer stress even during extended work periods. The centre-support structure minimises stress on the lens, thus avoiding distortion. The nose pads and ear stems maintain a comfortable, secure grip, even sweat could cause slippage.