Retinoscopy Filter Testing

Article from our SYntonac Magazine ”Tips and Pearls” Issue 1-2016.

by Stefan Collier


Behavioral Syntonic Optometry is a unique profession. One thing that makes this profession unique is how we are able to use light to gain insights into both the potential and the actual behaviors of our patients.

Sometimes the filter choice can be difficult. Therefore, I created the Syntonic Retinoscopy Filter Test (SRFT).

With the SYntonac Filter Paddle it is easy to determine the most effective filter combination for your patients. Just flip the paddle and look at the brightness of the reflex. This will give you as a Behavioral Syntonic Optometrist the direct acceptance or non-acceptance of the chosen filter stimulus.


A number of techniques for using a retinoscope have been developed. Different optometric pioneers had the idea or let me put it this way, had the insight that helped to bring that specific use of the retinoscope to the fore- front as an optometric diagnostic technique.

I think that it is important to note that there is no one right way to use this wonderful instrument. Also, no technique is better or worse than the other. Under different circumstances with the same patient, different retinoscopy techniques might give more clinically significant insights. With this in mind I developed the Syntonic Retinoscopy Filter Test (SRFT). Initially, I called it Stochastic Retinoscopy, but many colleagues did not understand the message that was behind the name.

Let me share with you, dear reader, how the ”SRFT“ is executed.

As mentioned before, the goal of the ”SRFT“ is to detect …..


SYntonac Magazine - Issue 1-2016 —->