Send the 'energy' through the "person in the mirror's" energy and don't worry about the 'reflection' your subconscious/deeper aspect will handle that.
It's important your energy 'gently runs through the block'
--this helps much better than sending energy INTO the block. Why so? Because you are 'drawing in energy from the universe' sending it through the block with the intent to gently open it, and it runs through to the ends of the universe and becomes 'purified energy' once again (thus completing a circuit or circular flow, almost 'electric')
Also, if you 'heal the person in the mirror' as if they are someone else, you instantly drop alot of the unconcious filters that might come up such as 'will I heal, when will I heal, etc..." it's much easier to say with confidence 'completely healed' if you pretend it 'someone else' --and as an added bonus, you'll even have more confidence when healing other people...

~Z