I finished the kumihimo necklace using all size elevens (instead of eights, which are bigger. Think eight beads per inch versus eleven beads per inch. Very approximately)
See how much nicer? The thicker necklace has better colour definition and those beads work really well with some of the other beads I've been using as accents within the braiding, like lentils and daggers and teardrops, but as a sort of wardrobe staple on which to hang things, the thin one is better.
I think I'm in denial about the fact that my eyesight is just not as sharp as it was. It's somehow always a surprise that oh! I can't see! I should put on my glasses! which sounds studiedly and annoyingly disingenuous but is in reality the same affliction that strikes so many people who are no longer in their twenties or thirties: they feel that they still are and every time they're reminded by reality it's just a tensy bit shocking.