The Veritas Rule Magnifier works very well, in my humble… (Please see attached photo)
Another common approach to what appears to be a very common problem – not solely related to presbyopia – is to use a magnifying lighting, as shown in the attached link
My better half arranged for me to have a pair of bespoke loupe glasses. They are very good.
(The below makes references to Metric and Imperial in a way that hopefully will not elicit another battle on unit of measure)
What makes Imperial attractive, I don’t think is that it makes measuring much easier, but that in woodworking it’s binary: e.g. finding the half 1 3/4″ (7/4″) is nothing more than multiplying the denominator with two and ending up with 7/8″. To accurately measure 7/64″ is probably not very different from measuring 2.5 mm