Yeah, I've pondered that too. My unfounded guess is that it's that they have very good foveated vision, essentially putting all their resolution into that cente

Yeah, I've pondered that too. My unfounded guess is that it's that they have very good foveated vision, essentially putting all their resolution into that center region. And to be sure I'm also unclear on the optics. I think there are real physical limitations in small eyes, but presumably there are diminishing returns, and there's more than optics that define the quality of vision.