To me eyewear goes way beyond being a prescription. It's like makeup. It's the most incredible accessory. The shape of a frame or the color of lenses can change your whole appearance.
I always see where I didn't do things the right way. I only see the heavy...
You do have to change things as warfare changes.
You can be a famous poisoner or a successful poisoner but not both and the same seems to apply to Great Train Robbers.