Our Roots


our roots

SYntonac International was founded on Syntonic Optometry principles as described by H. R. Spitler, and S. W. Collier.

"SYNTONY" Being adapted by a certain wavelength.

Quote by H.R. Spitler

The company directors are: Drs. Vasana Lerdvoratavee, Chula Lerdvoratavee  and Ronald Weingart.

SYntonac International is headquarted in Oswego, IL - USA.

We produce a quality line of products that allows the Behavioral Syntonic Optometrist to use a variety of specific filters and frames to improve the therapeutic outcomes of their patients. We also provide education for treatment protocols for each mode of therapy.

Want to know more about our products?

Please contact us, we're always happy to answer any questions.