Methods for diagnosis and treatment are provided for a patient having
processing difficulties, integration problems, imbalances or abnormal
postures. In one embodiment, a patient is identified having retinal
signal problems creating at least one negative medical condition. Then,
at least a portion of the patient's lacrimal drainage system is blocked
or altered. Further, as a result of the diagnosis and treatment, the
patient achieves improved retinal signal processing and at least one of
the patient's negative medical conditions is improved. Other embodiments
include using in combination the Z-Bell Test and/or light blocking or
altering devices for diagnosis and treatment.