LogMAR (HVZDS) pt. 2

Part 2 of my series on the LogMAR chart. I've noticed that this chart (HZVDS) actually contains the ONVSR chart starting on row 4 and ending on row 11. This means the ONVSR chart is actually only 8 rows instead of the 14 on a typical LogMAR chart, which strikes me as very odd. I don't know why anybody would make an visual acuity test less accurate on purpose! There's probably something I'm missing, but whatever. It's still weird.