spherical eyeball 3d model

Perfect spherical human eyeball, full globe geometry, completely round sphere, NOT flat, NOT cylindrical, NOT a disc, NOT a cutaway, ultra detailed organic iris embedded into the spherical surface, dense radial iris fibers, intricate flowing filament structures, chaotic vein-like patterns, layered iris depth, realistic anatomical iris texture, glossy transparent cornea bulge, deep black pupil, smooth curved sclera wrapping around entire sphere, highly detailed embossed iris relief for 3D printing, photorealistic macro eye anatomy, centered object, isolated sphere, sculpt-ready high polygon model, clean topology, no eyelids, no eyelashes, no face, no cut section, no sliced geometry, no mechanical parts