“Eye-Box” refers to the tolerance range of the user's eyes at the aiming position. Even when the user moves their head up, down, left, or right, they can still see the complete field of view and a clear image. Generally speaking, users must position their eyes precisely when using the device so that the image can be seen clearly. With even a slight movement, shadows will appear at the edges of the image. Muse's “Eye-Box” technology effectively solves this problem, giving your eyes greater freedom during use. Clear, complete images are still maintained when moving up, down, left, or right.