The inner "eye" of the planet is actually hollow... It appears as a projection, a display of a complete sensory reflection of the invert environment. The thin line of light between the inner and outer is actually what is being seen, as it is what reflects. Just as a mirror does not show it's reflection throughout the space between what is being seeing and what is against the wall, like a hologram would. Then that which is lit, is a real thing, yet the inside is nothing, and only a seen and dimensional reflection. It also happens to show a false portrayal of what is inside the sphere planet, when what is inside it, sees out. Basically, this planets organisms have a natural defense mechanism, of not seeing what is among them, but what sees them.