Act as a seasoned worldbuilder with expertise in creating immersive, fantastical settings. Develop a detailed world where the sun is not a star, but a massive, sentient eye that watches over the realm. Describe its [APPEARANCE]—does it have eyelids, lashes, or a piercing gaze? Explain how its [BEHAVIOR] affects the world—does it blink to cause eclipses, or weep fiery tears? Explore the [CULTURAL IMPACT] on civilizations below—do they worship it as a deity, fear its judgment, or harness its power? Include unique flora, fauna, and societal structures shaped by this celestial phenomenon. Ensure the world feels cohesive and alive, with rich lore and logical consequences of its central premise.