The iPhone 18 Pro features a nearly invisible Face ID system, which is embedded under the screen. This is a significant change from previous models, where Face ID was visible as a notch or a sensor area. To make Face ID less noticeable, Apple redesigned the area above the TrueDepth module, which is responsible for scanning a user's face using infrared light. The challenge was to allow infrared light to pass through the screen without creating a visible gap or dark spot. To achieve this, Apple adjusted the arrangement of the pixels in that specific area of the screen. Normally, the pixels block infrared light, but by reducing the density of the pixels by half in that region, Apple created enough space for the light to pass through. However, this could have made the area dimmer than the rest of the screen. To counteract this, Apple increased the brightness of the affected pixels. Additionally, a special filter was placed between the pixels to allow infrared light to pass while blocking visible light, helping to keep the area hidden from view. Even when examined closely under different lighting conditions or with magnification, the TrueDepth module remains nearly invisible. Only under a microscope can the structure of the area be clearly seen. This concealment helps reduce the size of the Dynamic Island, the interactive area on the top of the screen. As a result, the iPhone 18 Pro can now display up to three live activities at once, compared to two on earlier models. While the Face ID system is now under the screen, the front-facing camera remains visible. Apple could, in theory, place the camera under the screen as well, but the trade-off in image quality is currently too great. For now, only the part of the screen necessary for Face ID has been hidden, preserving the visibility of the front camera while improving the phone's design and functionality.