Eye Health Question

We went to the eye dr. yesterday and they found dh's pressure a little high behind his eyes. he goes back on friday to get dialated so they can take a closer look. is this a huge deal? the dr didn't seem alarmed, but i got a little worried. i spoke to my aunt in TX who is an optician and she said it's a good idea to just get it checked, he's prob. fine though-

anyone know about this? thanks!!!