Yeap, something that we need to get used to. I had a terrible start on the long, trying to read the map at 15k. With magnifier and some glasses. Too bad that one cannot enjoy terrain /courses to much, cause... we are getting old, and eye sight is not there as many years ago
Got myself a pair of these:
which have hidden 1.5 reading glasses built in bifocal style. Clever, light and effective.
Stylin'! In a similar vein, the triathletes pointed me toward Dual Eyewear. For technical orienteering in the forest, I use clear lenses. For easier navigation, non-forest sprints or biking, I use sunglasses.