Scleral Search Coils (SSC)
CHRONOS VISION produced the Scleral Search Coils (SSC) as the official successor of its former business partner SKALAR Medical of Delft (NL), offering both 2D and 3D variants.
What is meant by "Scleral Search Coil" (SSC)?
Among the various techniques for measuring eye movements, the “scleral search coil” technique has been considered the “gold standard” for about 40 years. The technique was developed by Dave Robinson and later refined by Han Collewijn for use in humans. A coil embedded in a silicone ring is placed on the sclera (the white of the eye). While the test subject is positioned in a homogeneous magnetic field, a voltage is generated according to the law of induction, depending on the angle of the coil (and thus the eye). This technique still provides the most precise, continuous measurement of eye position in all three dimensions.
The scleral search coils have been successfully tested and used with all standard Helmholtz coil systems in a number of research laboratories in Europe and the USA. They are suitable for a wide range of studies in medical and physiological research that require precise measurements of two- and three-dimensional eye movements.
Two types of SSC designs were offered:
Directional Coil or 2D Coil
designed for measuring horizontal and vertical eye position.
Torsion Coil or 3D Coil
designed for measuring horizontal, vertical, and torsional eye position.
Product Brochure Download
(discontinued product!)