Is it OK to have an empty anchor tag?

Question

I know that I can do the following if I want to turn an image into a click-able link:

Answer 1

It's valid, but it's best if you did put something in there and used something like

font-size: 0;

to hide it away. This way, if someone does not have CSS (screen readers for example), he would still be able to tell approximately what the link is about.

Here's a great article on the subject