As a spry 67 year old I feel your pain regarding vision and other assorted ailments.
I've been using a couple of SON generator hubs for over 20 years (well, one is that old).
I hooked up with the Supernova brand headlight when they came out 16 years ago or so.
This one is the 1st gen w/German approved lens, the light is focused on the road, not the entire horizon including the space station .
Still running strong and lights up the road.
And never runs out of juice. Highly recommended.

Reporting from Bangkok