MamaQ: Although the problem could be caused by disease, or brain tumours, it is not uncommon for a latent exotropia (sounds better than wall eye
) to manifest after childhood. This condition involves the brain and eye muscles not working properly together. The solution could be prisms in your glasses, or perhaps down the road, eye muscle surgery.
Since you are looking for a new doctor, I would strongly advise you to look at the AAPOS website and find a board certified pediatric ophthalmologist in your area. POs are the experts on misaligned eyes and they take adult patients. The list on that site contains the best of the best.