This paper presents a structural model of perception based on boundary geometry. Perception is described as a closed-loop process composed of four interrelated phases—conception, perspective, perception, and meaning—contained within a boundary condition that both enables and completes the perceptual cycle. The model treats perception as a geometric process in which coherence arises through boundary completion. The framework applies across physical, cognitive, and informational systems through structure alone. boundary geometry, perception, conception, perspective, meaning, coherence, closure, relational systems, cognitive structure, structural cognition, embodied perception, systems theory, boundary conditions, informational geometry, perception loop, sense-making, contextual stability, relational closure, systems cognition, perceptual coherence, cognitive boundaries, structural awareness, perception cycles, coherence systems, relational perception, geometric perception, enclosure, differentiation, orientation, experiential structure, meaning formation, cognitive geometry, system stability, boundary completion