When using a spotting scope for lengthy glassing sessions—searching a hillside for an invisible group of elk, or searching the sagebrush flats for that trophy mulie or antelope–fatigue and strain quickly set in, causing discomfort in the non-viewing eye and surrounding facial muscles. The muscles try to hold steady in this unpracticed position in order to support the viewing eye. This can be very uncomfortable, causing headaches or ultimately causing you to miss the ear twitch, or the antler tip of the big ‘un that is just waiting for your tag.
There is a simple and inexpensive solution for this problem. Before your next glassing session, visit your local drug store and purchase a black eye patch with an adjustable or elastic strap. Wearing the patch over the non-viewing eye will allow your eye and facial muscles to relax so that you can concentrate on glassing without the risks mentioned above. A second benefit is that you may resemble Rooster Cogburn while searching for your quarry.
Remember to store the eye patch in a handy spot for the next use. I keep mine inside the zippered field cover that protects my spotting scope.
Editor’s Note: A light-colored patch would also work, and allows the covered eye to receive light and track with the uncovered eye.