About Stefan

He is a leader in bringing Behavioral/Functional Optometry and Syntonics to Europe. Stefan‘s knowledge, and willingness to share, has allowed him to have several awards bestowed upon him over the years.

- 2002 & 2004 The Armand Bastien Award from Optometric extension Program Foundation (OEPF)

- 2010 The Skeffington-Alexander International Award from OEPF

- 2011 The Spitler Award from the College of Syntonic Optometry (CSO)

- 2012 The Lifetime Achievement Award from Behavioral Optometry Academy Foundation BOAF

- 2014 The International Lifetime Achievement Award from OEPF

- 2015 The - Premio Robert y Linda Sanet- Award from SIODEC

- 2016 The Advancement of Neuro-Optometric Rehabilitation Award from NORA

Stefan‘s Book


In this mini guide you can find a brief outline on how to apply Syntonic Optometry - Syntonic Phototherapy in an optometric office.

Basic concepts and principles based on the College of Syntonic Optometry (CSO) curriculum courses, thought and taught by the author, are put together in a very handy guide for starters or as a reminder for practitioners.

English / Version


Also as Ebook available


and other On-Offline Bookstores.


The purpose of this website is to give you some global information on Behavioral/Functional Optometry, Syntonic Optometry and Neuro Optometric Rehabilitation. 

You can also find more information about the Behavioral Optometry Academy Foundation (BOAF) and the European Academy of Syntonic Optometry (EASO), 2 wonderful organizations. These organizations have special Lists where members can share knowledge with each other and they also have a Live Chat. Visiting the following websites is really a must.

BOAF - LINK --->

EASO - LINK --->


The SC-WEBSITE is still in a developmental stage. So visit regularly and discover the novelties.

Thanks for visiting my website.


Limbic Balance Method

Favorite Links


The Limbic Balance Method (LBM) identifies and removes emotional legacies that we unknowingly carry around with us and that can be the cause of physical and/or emotional difficulties. These subconscious emotions can distort your energy field and brings you out of your balance. 

The LBM-Method is created by Yvonne Frei & Stefan Collier.

Emotional Fatigue - Depression - Burnout

FSOF - Functional Syntonic Optometry Forum

The FSO Forum is supported by a team collaboration software that brings people and the resources they need to one place, making it easier to share and learn about Functional Syntonic Optometry (FSO).

The FSO Forum is moderated by Stefan Collier, Chula Lerdvoratavee, Vasana Lerdvoratavee, Ronald Weingart and Yvonne Frei.


If you have any questions or you just want to post to STEFAN, just fill in the contact form.

(he will answer asap)

 (The translation of this website is done with Google-Translate)

The SC-WEBSITE is still in a developmental stage. So visit regularly and discover the novelties.