The black dots on windshields, known as frits, play a crucial role in preventing damage, enhancing visibility, and facilitating efficient temperature regulation. They distribute temperature evenly, minimizing the risk of cracks from sudden temperature changes. Additionally, the dots help preserve the adhesive that bonds the windshield to the frame, ensuring its secure placement even in extreme temperatures. Furthermore, the dots reduce optical distortion, making straight lines appear straight instead of curved. While aesthetics also plays a role, the primary purpose of frits is to provide practical benefits that contribute to driver safety and vehicle functionality.