About

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.
Offering a precise product leads to a faster and more successful therapy.

Want to know more about our products?

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