Yes. Vampires do not form reflections and do not cast shadows, or, alternatively [but infrequently] appear as reflections or shadows without any visible obiect to form such a reflection or cast the shadow. It is further known that they are aware of it, from which it follows that they couldn't see their own reflections as well.
Have it on good authority that they know we cannot see their reflections. They also know we think they cannot cross running water or that garlic keeps them away or that they cannot enter a house without being invited. Sneaky sobs.