The new visibility panel enhances the ability of the dock door to lower energy costs. This full panel section, comprising at least a quarter of the door area, allows sunlight and provides visibility to the outside to monitor truck traffic. The unit can effectively ward off material handling vehicle collisions and suffer no damage. The 1.75" panel consists of a double section of 0.125" thick polycarbonate, bonded to an extra-strong tubular frame. The panel features an easy-to-clean surface.