https://www.makeuseof.com/vision-pro-eyesight-feature-explained/

An outward-facing OLED panel on the headset's front uses a lenticular lens that Apple says projects "the correct perspective of your eyes to each person looking at you."

Correct perspective = different per outside viewing angle. This is exactly the purpose of light field displays.

https://arxiv.org/html/2407.14053v1

It is worth mentioning that Apple Vision Pro’s EyeSight [Kim et al. 2023] also utilizes the lenticular lens displays to project the correct viewing angle of the virtual eye images onto each person observing it.

https://appleinsider.com/articles/21/03/11/apple-developing-stereoscopic-display-technology-likely-for-headsets

I think you have holographic light field displays in mind. That's the more advanced and high detail version, but this too projects a light field although a much simpler and lower detail one.

And if you're talking about the inner screens, that's not the topic here (I clearly mentioned the "eye window"). The inner displays just use standard VR optics.