A Cyclops is a small magnifying glass mounted on the crystal, usually aligned above the date window for easier reading of this function. This feature is very common on date watches and may be immediately identifiable on some of the most famous models. The Cyclops lens enlarges the date about 2.5 times, making it very convenient for quick, clear reading. Although a small addition, it greatly impacts reading, especially among people who prefer not to squint to check the date. Cyclops has become a distinguishing feature.