For the benefit of hams who happen to be sighted, here are a couple of posts written by blind hams who routinely use soldering irons. There is more, very positive material, elsewhere on the Web.
The first is a brief introduction to the subject.
The next goes into more detail.
And finally, some general ARRL material on the subject of hams who happen to be blind
The point of this post is...in amateur radio soldering, it's often safer if the blind lead the blind.