Blind soldering with an Instant Heat Battery Soldering Iron
I've been doing hobby electronics since I was first old enough to be trusted with a soldering iron and not to burn myself, or burn the house down.
So, after I lost my sight, soldering became a problem and a very upsetting loss.
I have only recently felt very strongly that I wanted to find a way of doing some sensible soldering and hobby electronics again.
I acknowledge that I am not going to be soldering QFP surface-mount SoC chips or MCUs any time soon. But I have found some techniques which mean I can now manage most of the typical old 0.54mm (0.1 inch) pitch through-hole components and boards.