Realistic eye replicas are a focal point for conveying lifelike presence. The anatomy begins with the sclera, where a subtle translucency and veining mimic natural complexity without appearing artificial. The iris delivers color depth and microtextural variation that catches light differently at various angles, requiring multi-layered pigments and reflective granules to imitate depth. The pupil must respond to lighting with authentic dilation, achieved through precise calibration of lighting, shading, and, in some models, mechanical iris elements. The cornea is crafted to deliver a convincing gloss and curvature, allowing light to scatter in a way that mirrors real optics. Edge smoothness around the limbus—the border between eyelid tissue and the iris—prevents a “cut-out” look. Eyelids should be designed to sit naturally, offering subtle eyelid movement and proper seam concealment. Mounting hardware must permit realistic blinks and minimal mechanical latency, while ensuring durability under handling. Material choices range from silicone-based organic compounds to resin blends, balanced for durability, weight, and touch. Quality control includes inspecting colorfastness, moisture resistance, and alignment with the socket to sustain a believable gaze. A well-crafted eye replica elevates realism, contributing significantly to the perceived presence of the doll.