The affected region—the spot where he was absolutely blind—was not black, as you might imagine. This could be proved simply by closing his eyes so that he actually was seeing just black. The blind spot then showed up as a region of vaguely defined yellow and black stripes, like the patterns painted on factory floors to limn danger zones, except that these flashed and fluctuated like an old-time television with its vertical hold out of whack.

Even as he drew these connections he was erecting defenses against a likely flanking attack from Polycultia, one of the Furious Muses, who was always pointing out that everything Richard could possibly think of was culturally relative. In this instance she might expect tactical support from Cerebra, an unintentionally offensive FM who had a knack for pointing out that any idea Richard came up with that he thought was clever was, in fact, but an imperfect rendering of a smarter idea that had occurred to her a long time ago. The projected line of attack from the Polycultia–Cerebra axis went something like this: Okay, because part of Richard’s visual cortex was on the blink, he was seeing “nothing” in that region. His brain was in the business of constructing, from moment to moment, the sort of three-dimensional model of the universe that, for example, enabled him to grab his phone from his bedside table without opening his eyes. As such, it couldn’t tolerate seeing a patch of “nothing” in the middle of an otherwise coherent reality. So it tried to fill in the nothing with something. It was simply the visual equivalent of tinnitus.

But why this particular something? He construed it as black and yellow danger stripes, on-the-fritz TV sets, etc., but that was only because he was a white guy of a certain age from Iowa. A Maori midwife or a gay Roman centurion or an eleventh-century Shinto Buddhist, in the grip of the same underlying neurological phenomenon, would fill in the “nothing” with some other kind of hobgoblin derived from their own set of cultural referents—e.g., the wall of cold magical flames surrounding Gymir’s realm in Jotunheim (according to Norse).

Being temporarily blind gave him an excuse to not expose himself to the Din. In an earlier decade he’d have said “not check his email,” but of course email was actually the least intrusive of all the ways the Miasma—as Richard referred to the Internet—had devised to bay for your attention. Richard lumped all of them together under the general heading of the Din. He deemed it unlikely that there would be much that was important in this morning’s Din, since he had caused his administrative assistant to weave a system of spells and wards: robotic “out of office” messages and whatnot.