How Can I Make My Icon System Accessible?

Here's a question I got the other day?

Would you suggest icon fonts or inline SVGs for a complex single page application? And are there specific accessibility concerns for either? Accessibility is especially important for us because schools use our products. I ask because we are currently in the process of unifying and setting up an icon system.

I don't think I would make the choice based on what "kind" of website I was building, so let's ignore that part …

How Can I Make My Icon System Accessible? is a post from CSS-Tricks