Current production Vortex Viper HD 10x50 have 16mm worth of eye relief, and the actual usable eye relief is probably closer to 14 or 15 as the glass is recessed beyond the eye cup by a 1-2mm.
I had returned a pair of the 8x42 Talons and Vortex said they didn't currently make a suitable replacement for someone needing 20mm. So they rebuilt a pair of Talons from their Talon graveyard and shipped them back to me.
Two things can increase eye relief; and they are power 8 always has better eye relief than 10 or 12, and objective size. That is why 8x56's generally have so much eye relief. The company must consider eye relief in 42, 30, 32 and 50mm binoculars as a priority in design.
Leica used to be the place to buy eyeglass wearer approved binoculars but they seem to have forgot us of late. Swarovski, Minox, Kowa and very few others are really doing us a service. Maven, Vortex, Burris and Leupold are about as bad as Leica on eye relief. Hopefully someone will remind them that the baby boomers and older Pepsi Generation aren't getting any younger and millennials are tied to their computers and cell phones.