As you might guess, I look at feet quite a bit. I began to notice how feet would lay when a patient is face up and face down. It is more difficult to evert the feet with the DNFT® leg check when the feet lay assymetrically. I found that I could adapt if I concentrated so it became a non-issue...until I began to ponder why the feet were that way...and if this would affect a patient's ability to maintain an adjustment.
As I continued to ponder this, I was introduced to Dr. Ed Glaser's work. His orthotics consider gait as well as the shape of the bottom of the foot. I have been fitting patients with these orthotics by choice.