Each photon is reflected to a specific, targeted location on the retina. This is in contrast to normal vision where photons are reflected from and to multiple angles.
Which is why this is always perfectly in focus -- the normal path of light means that light is captured across the surface of our eye and needs to be focused to converge on a point (within the limits of the eye's ability to do so, and with the reality that it only has one focus distance at a time). This system, in contrast, is "painting" the retina so that it is addressing specific target pixels, so to speak, regardless of the focus of the eye.
Their terminology seems okay.