eye iris 3d model

A highly detailed, realistic human iris, modeled as a flat or slightly concave circular disc — NOT a full eyeball. Focus all geometric and textural detail on the iris itself: intricate radial fibers (trabeculae), crypts, furrows, the collarette ridge separating the pupillary and ciliary zones, and subtle color variation across the stroma. Include a clean central circular opening for the pupil (empty hole, no lens). Exclude the cornea, lens, sclera, and the rest of the eye globe. The iris should read as an isolated anatomical structure with micro-surface displacement, fine fibrous texture, and realistic depth in the stromal layer. PBR-ready, high-resolution surface detail concentrated entirely on the iris.