Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
In my opinion, your condition is benign if you're not having any symptoms referable to traumatic
brain injury and no symptoms referable to what one would expect from someone with 2 different sized pupils.
If you were my patient, and if my motives were to get you tested (this many years after birth?) for whatever the reason, then my first notion would be to send you to an ophthalmologist.
There are MANY more cases of BENIGN and CHRONIC
ANISOCORIA in the general population (that is it's not THAT uncommon) than are due to
head trauma.
Secondly, I would ask exactly WHICH TEST is he planning to do? If you'd like to send me 1 photograph of your eyes (without flash) and 1 with flash, so that I can see your pupillary responses.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Dariush Saghafi