fovea

Presumably as the fovea is centered on the highlighted letter, resolution for letters farther away decreases gradually, so increasing letter size may compensate for it.

Visual acuity at the fovea is around 1 arc minute.

Let's say you can do that at 100 kbps, and the pixels on the fovea are 1 mbps.

Of course, the human eye doesn't work that way: resolution drops off rapidly away from the fovea.

Even 8,293,254 isn't that hard to order-of-magnitude from the near-fovea while you're focused on the 8.

The retina cells (mainly rods) further away from the fovea are bad at distinguishing things, but excellent at detecting rapid movements.

And you only need render the center of it in sharp detail (what impinges on your hi-res fovea); the surroundings can be blurry and even monochrome (no cones outside the fovea, only rods!).

It's constantly moving[1], bringing the higher-precision fovea at the center of your retina to bear on interesting parts of the scene.

Numbers that don't fit easily within the fovea require effort under either scheme.

Recent research[1] has found a fovea like structure on the canine retina.

However, while the vision at the fovea is very sharp, it is also very slow, and while the vision at the edges is very fast, it is very blurry and imprecise.

If you can track the eye with low enough latency you only need to render high res in the tiny fovea region, low res everywhere else.

Back to the eye example: vetebrate eyes have a "fovea".

One solution is a "fovea" system that scans an area for interesting items and zooms in on them with a high resolution camera automatically to get better recognition.

Your model of having to go digit-by-digit is a computer's scanning model, not a human perception model; we do not scan that way, we scan in fovea-sized chunks, which are smaller than people may think because the brain is very good at interpolating before the information hits the conscious mind, but is still large enough to fit "millions" in quite comfortably.

"Researchers observed that the cells seemed to develop normally, integrating into the existing retina and forming the nerve connections needed to transmit visual information to the brain." I'm curious to know if these are expected to develop into normal retinae - including the macula densa and fovea centralis - or if they instead provide peripheral-equivalent vision throughout, even at the center of vision.

The Fovea, the center of our vision, is entirely cones, while the outside is almost entirely rods.

Fovea is a small patch of the retina with increased density of visual receptors.