In order to tell if your glass is tempered you should check the original packaging. Companies will specify if it is safe for the microwave and/or freezer. If you do not have the original packaging it is best to contact the company directly.
In a reachâgrasp task for targets within the binocular visual field, subjects switched between left and right eye dominance depending on horizontal gaze angle. On average, ocular dominance switched at gaze angles of only 15.5Â° off center.
Field of view is expressed in feet, at a distance of 1,000 yards, or meters, at 1,000 meters, and is the width of the visible area that can be seen without moving the binoculars. Generally speaking, the higher the magnification and smaller the objective, the narrower the field of view.