About us

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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.