Cat's eyes, also known as reflective road studs, are small devices that are embedded into the surface of roads to help drivers navigate safely at night or in poor visibility. There are a number of synonyms for the term "cat's eyes", including road studs, pavement markers, reflective studs, highway markers, and traffic delineators. These devices are typically made from durable materials such as ceramic, glass, or plastic, and are designed to reflect light back to drivers, making it easier for them to see the road ahead. Whether you refer to them as cat's eyes or by any of these other terms, these reflective road studs are an essential tool for keeping drivers safe on the roads.