It’s funny how people manage when working with watch movements or anything tiny. I wear glasses all the time. When I was working on watches I would take my glasses off and use an eye glass, I couldn't stand one of those flip down eye glass that fix to your frames it was like looking through bifocals.
This is also often asked. It's common for ball bearings to be a bit lose or noisy, especially after decades of use without any lubrication. The screw has not effect whatsoever as it's there to just keep it in place. As long the weight doesn't touch anywhere, and the watch winds, all is good.
First, the hairsping in the picture is unacceptably distorted, many topics on the subject of correcting an HS and the difficulty of the task - high. If you want to show how an HS looks like, remove cock, lay it down and shoot from above.
Then, fault finding consist of taking the entire mov't apart, clean it the best possible, inspect every part under magnification, pivots, jewel, gear teeth for damage. Put it back in the most basic form and test every function, end shake of every wheel etc. You can do that even without oiling because it will run anyway, not perfectly but it must not stop. Again, the forum has many many repetitive threads, which will tell you always the same things, just as any book would.