The door viewer, also known as a peephole, is a small optical device mounted on exterior doors. It offers a wide-angle view of the area outside, enhancing security by allowing occupants to identify visitors before opening the door. Positioned at eye level, it provides a clear and magnified image, enabling residents to verify the identity of visitors and assess potential safety risks. Modern door viewers feature adjustable lenses and built-in covers for privacy. They come in various finishes and styles to complement different door designs. Overall, the door viewer serves as a simple yet effective security measure, providing peace of mind to occupants.
