Is Buddha the root of Dhamma?
Buddha is the root of the Dhamma as in Buddha is the root source of his teaching.
Buddha is the eye of the Dhamma as in the Buddha's omniscience and all seeing knowledges are what see the the Dhamma that is hidden from the world.
Buddha is the foundation of the Dhamma as in the Dhamma preached by his followers are based on the teachings of the Buddha.