Do your feel eyestrain even with your new glasses? Does it seem difficult to concentrate when working? It might be that your eyes are not working efficiently with each other. It’s similar to the wheels of your car being out of alignment. Your car drives forward but it is not easy to steer. To solve this problem known as Binocular Vision Dysfunction (BVD), micro-prisms are incorporated into your spectacle lenses to realign the image that each eye receives. This reduces the strain caused by the muscle imbalance of the eyes.