Welcome to Manjaro!
- My dad’s visually impaired too and I’ve set his zoom settings to the following:
and he does not experience the same effects you describe.
Ctrl+Alt+Z zooms in under his cursor and Ctrl+Alt+Shift+Z zooms out -
Do you have a compelling reason to be on the 5.13 Stable Development kernel?
If that’s just the default and you never changed anything, please read this:
[HowTo] become a Manjaro power user when you're a wizard at Windows but a N00b at Manjaro / Linux
and then install at a minimum Kernel 5.10 LTS and boot that.
(If you need more help installing that, please shout out) - As you seem to be new to the Manjaro ecosystem, please read the rest of that tutorial too for the bits you don’t know already (and a good laugh too)