Too heavy, limited field of view, inappropriate angle

I can not do anything with these glasses. The prisms are too far from the eye, and too small, so that the field of vision is very limited. The relatively small screen to eye strain. In addition, the angle is not adjustable, yielding only eingschränkt can change the posture. Finally, the glasses are very heavy and after a few minutes she presses her nose. I give two stars because it noticeably relaxes the neck.