I think it is twofold. First it is a teaching, and second it is a statement on how things are seen (right view).
In my eyes, the teaching aspect is not aimed at sotapanna, because they already understand this teaching. There is no use explaining something to somebody who already understands that thing. So in the first place, the Buddha said this to his disciples who didn't yet understand. Of course, here sotapannas can use the encouragement of the Buddha to let go further of the attachment to the senses, but they don't need to cultivate their view anymore. So the teaching itself can be reflected upon by anyone, whether sotapanna or not.
But on a deeper level, it speaks of "seen thus" which indicates not an intellectual understanding, but an experience. I'm with what Sylvester has said on it. But to clarify it a bit further: it says eye meets an object, the meeting is contact - that's it. The important thing here is that there is no other thing involved. So understanding this, in a sense is understanding anatta. And this also gives rise to the 'disgust' or repulsion. Because one sees no self in it all, there is no need to sustain the process. It is empty, so worthless in a sense. And it is this repulsion that drives those without self-view to nibbana. Of course the repulsion has more aspects, including understanding how clinging to the feeling leads to suffering, but you get the idea of my post I think.