This is not truly amblyopia, or lazy eye, in which an otherwise anatomically normal eye does not see well. You have a blind left eye, which will tend to drift over time. Muscle surgery to straighten the eye can be done, leaving the left eye slightly in (esotropic), so that it does not go back out as far as before. The surgery should be done by someone very experienced in eye muscle surgery, and can be done with a technique called an adjustable suture, to try to fine-tune the result the same or the next day.