To the OP,
This is an issue I do have to deal with. After an injury, I lost a significant degree of low-frequency hearing in my left ear (still have my highs). Depending upon the frequency, it can be as much as a 10 db difference from left to right.
My first suggestion is to make sure you aren't dealing with something stupid and easily fixed... like an excess buildup of earwax. Happened to a friend who thought he was losing his hearing
Anyway... get used to working with Mono audio for a bit. Set it dead center to get used to what it feels and sounds like to both ears, at different frequency ranges -- if there are differences between the ears, you'll notice. Map out where the problem zones are for you (and/or see an audiologist). Also get a number of audio files you know for a fact are centered, at different frequency ranges, to use as reference material. Again, mono files are best for this.
Once you've established that indeed there is a difference between the ears, you'll need learn to use your analysis tools to help you keep yourself honest. Do not make adjustments to the panning so that it sounds centered to you.
Don't try to make yourself comfortable. If the meters say it is centered, it is centered -- don't rely on your perception. This is why we have these tools -- to keep ourselves honest due to the faultiness of human perception. When I'm using panning controls, I use every meter at my disposal to make sure the audio is centered. If I perceive more bass in the right ear than the left, odds are the bass frequencies ARE in the center, my own perception be damned. If you do have permanent differences between your ears, deal with them and get used to them -- you adjust to the audio, don't adjust the audio to you. It will be second nature in no time, if you work within such a constraint.