In this case the moon eye must be the "vase", empty at the moment as the cobra has not an eye to see, because the sun eye has just eaten up the full moon shown on his bend there.

There must be something precious in this pyramid for "the sun and moon" to protect, and I don't see gold and silver, but some secret in symbolism they want to convey. The fully formed white crown of "upper" Egypt is definately there, so maybe they had Re, not Ra in mind.

Charlotte