One simple tip for dealing with declining vision:

Get a flat tape and lay the square across it to mark. No parallax errors and easier to make an easy to see mark.

Tip.jpg

If your vision is declining and you have not heard of Derek Cohen;s Blue Tape trick, I urge you to go to his website and learn about it.

If you have a tip for overcoming challenges, please post them to this thread so that we have one place to accumulate them (unless there already is oen and I missed it)