Both eyes are impacted. The immediate issue is that my special hard contact lens were lost this week so I have to wait a couple of weeks for the optometrist to get replacements manufactured. I can read with one eye if I am within about 3" of the screen, which is physically difficult.
It probably is in Jacobson. It's definitely in Ebertin's books on solar arcs - by example more than explanation. Often the descriptions are complex, e.g., Uranian astrologers talking about a + b - c equations that another planet completes, but all these are just tactics for getting at something really simple: 45° aspects between points and midpoints (and midpoints to midpoints), and reading each factor as a synthesis of all the points and midpoints on its axis.I can't recall ever reading anything about this type Solar Arc analysis to the Natal calculating possible specific Natal Midpoints to focus on. Is this type Solar Arc analysis found with examples in Jacobson book “The Language of Uranian Astrology,” or any specific article in Spica? Or is this a special case with Trump/Election noted randomly as a rare coincidence by you with the Dial? If you ever run across more examples of this type Solar Arc analysis, I would be most interested and appreciate you posting.
The math of all of this is quite simple, but you have to think it through: The unique characteristic of Solar Arcs is that all solar arc planets keep the same relationship to each other that they have in the natal chart. So, for example, if your natal Sun and Jupiter are 56°52' apart, then Sun and Jupiter in the solar arcs will always be 56°52' apart, too. (You can sort these distance lists, too, to get aspects between the points; let's keep it simple for now.)
Now, your Jupiter is 56°52' ahead of your Sun. Looking further, we see that your Mercury is 56°07' ahead of your Saturn. That means that when your solar arc was 56°-something, you had both solar arc Sun conjunct your Jupiter and solar arc Saturn conjunct your Mercury.
Now, there is a rule - you can work it out mathematically - that any two pair of planets with the same distance between them makes exact midpoint aspects. Something I sometimes do is use this as a way to flesh out the meaning of aspects. For example, you have Mercury sextile Pluto -0°04' and Sun sextile Mars +3°00'. Because Mercury sextiles Pluto and Sun sextiles Mars, we know that there is a conjunction of two midpoints involving these four planets. (Equal distances apart always mean midpoints, and midpoints involving planets actually in aspect are theoretically stronger. - A glance at your chart (at Mercury, Pluto, Sun, and Mars) tells us at once that the lineup must be Sun/Pluto = Mercury/Mars (the two inside planets and the two outside planets). We can average the orbs of the two aspects and see that the two midpoints will be 1°32', which is a little wide - but it makes the point as an example!
Looking at your midpoints, we confirm that Me/Ma is 10°00' Leo and Su/Pl is 11°32 Leo - they are conjunct with the orb we anticipated, 1°32'.
Let's suppose these were closer. We would then suspect that there would be an important life event of the combined nature of Me/Ma and Su/Pl when these two solar arcs simultaneously matured, which would be when Pluto directed to conjoin Mercury simultaneously with Mars directing to conjoin Sun.
On a physical 90° dial this takes a few seconds to see the pattern and calculate the timing! It's one example of where we have lost something with computers.