EHS Clinical Centers - are located primarily inside of the locations of American Optical Services (AOS).  There are dedicated audiology and dispensing staff to conduct diagnostics, fitting and dispensing of hearing systems. EHS Clinical Centers offer the value and comfort of a medical setting for the patient to get the best quality products and care. We believe in the value of operating within the medical optometry and ophthalmology channels of American Optical Services and have a strong partnership with this quality organization.  The hearing devices are a premium value for the very best technology available.