VISION ACCESSIBILITY can be improved through Finder, etc.
http://www.macworld.com/article/2026699/stop-squinting-make-text-bigger-in-os-x. html
I can't find that question/answer but someone else gave this link to an article which I think when followed exactly will give many
users better visual clarity than they would without these customizations. The one on in Finder> View> Show View Options one changes
the font size it changes them NOT ONLY IN FINDER BUT IN MAIL AS WELL (for those who have complained about visual clarity on
that app.) On each stop in Finder there are many choices using "Show View Options" and at the bottom of each one is the choice
to choose the selections made as a default, which as the article indicates is important. Try it, the article is simple and clear and a
good source. "May you be at ease."
OS X Yosemite (10.10.5)