Home/R.A.D.A.R. Method/Definitions


Before we go deeper into R.A.D.A.R. Method, lets introduce some helpful definitions.


  • Fixation: is the maintaining of the visual gaze on a single location. On average, fixations last for around 200 ms during the reading of linguistic text, and 350 ms during the viewing of a scene.
  • Saccades: are quick, simultaneous movements of both eyes in the same direction.
  • Reading path: is the resulting series of fixations and saccades.
  • Visual acuity: it describes the acuteness or “sharpness” of vision; that is the ability to perceive small details.
  • Regressions: is a backward movement of the eye when reading a line of text- good readers do it less than weaker readers, who go back to check things more frequently.


 zoo controlzoo dyslexic


The reading path of a normal reader (left) and a dyslexic reader (right). Blue circles are the fixations and the orange lines are the saccades. The bigger the circle, the longer the fixation duration.

R.A.D.A.R. Method

Why choose R.A.D.A.R.

It's fast

It only takes 15 to 20 minutes for a full session.

It's easy

All you need to do is read a text from a computer screen.

It's objective

The process and measurements are examiner independent.

It's precise

Success percentages are currently above 95%.

It's user friendly

The reader does not need to wear or use any device.

It's non-invasive

The reader just reads silently a text, like reading at home.

It's re-testable

Can be re-administered to evaluate effectiveness of therapeutic processes.

It's unique

It works with unique algorithms.

It's for everyone

R.A.D.A.R. Method is age-free and user-free!