DeyeRECTOR Software Suite
The DeyeRECTOR Software Suite is designed as a software package in combination with the DeyeRECTOR Eye Tracker camera. It is developed as a set of OEM components and modules, specifically for eye tracking applications in ophthalmology as well as other medical and industrial fields.
Cutting-edge Technology
Our modules are optimally coordinated and always align with the latest state of technical and medical research to offer the best possible results.
Interfaces and Peripherals
The DeyeRECTOR Eye Tracker camera with the DeyeRECTOR modules offers extensive interfaces for connecting peripheral components as illustrated below:
Overview of DeyeRECTOR Modules
| DeyeRECTOR.pupil | x- and y-coordinates of pupil or limbus centre pupil-basic: 100-500 Hz at 720 x 540 px pupil-advanced: up to 1500 Hz |
| DeyeRECTOR.shift | ompensation of current pupil position with respect to the limbus |
| DeyeRECTOR.torsion | torsional eye tracking up to 300 Hz |
| DeyeRECTOR.tilt+z | up to 500 Hz measurements of • horizontal and vertical tilt angles of the eye relative to the camera axis + • distance of camera to eye |
| DeyeRECTOR.ident | correct patient and eye identification |
The DeyeRECTOR.pupil module determines the x and y coordinates of the pupil, or optionally the limbus center. Special attention has been paid to improving the algorithm’s performance regarding occlusions, instrument artifacts, and distracting reflections. This component achieves a spatial tracking resolution of approximately 0.01° respectively ≤ 5 µm.
The pupil module is equipped with two options:
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Pupil-Basic, with a selectable frame rate of 100–500 Hz at 720 x 540 pixels
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Pupil-Advanced, for demanding requirements, enabling tracking rates up to 1500 Hz via software
The DeyeRECTOR.pupil module enables high-speed pupil or limbus tracking with a processing latency of less than 0.2 ms.
It is known that pupil size is influenced by lighting conditions and a range of physiological factors such as the patient’s vigilance, anxiety, or accommodation. When the pupil size changes, the pupil center can shift relative to the cornea or limbus, leading to errors in the shot coordinates and thus to suboptimal results.
During observation or treatment, the DeyeRECTOR.shift module compensates for this effect by correcting the current pupil position relative to the limbus.
Ocular torsion or cyclorotation of the eyeball can significantly affect the outcome of a procedure, such as refractive surgery or IOL operations. Torsion can occur for several reasons. Firstly, differences in head position relative to the camera between diagnosis and surgical scenarios can lead to static changes in cyclorotation. Changing from upright head posture to supine position can also cause small changes in torsional alignment, especially for patients with latent vestibular disturbances. Anesthetics used during surgery can also influence the tone of the extraocular muscles. Furthermore, dynamic cyclorotation can occur during the operation.
Accurate measurement of eye torsion is therefore important for optimizing surgical outcomes. The DeyeRECTOR.torsion module enables robust and accurate measurement of static cyclorotation between diagnostic and surgical units as well as continuous online monitoring of dynamic torsional movements during the procedure. DeyeRECTOR.torsion offers torsion tracking rates of up to an unrivaled 300 Hz.
During observation or treatment, the eye may rotate around its horizontal and vertical axes. However, the resulting shift of pupil or limbus in the camera image does not reflect the actual movement of the treatment zone, which is located on the corneal surface about 3.5 mm above the pupil.
If the procedure is based solely on the lateral position of the pupil, applied laser pulses may ablate corneal tissue at incorrect locations. Refractive surgery that does not account for such rotational movements can impair the patient’s vision, as the resulting refraction may significantly deviate from the intended correction.
The DeyeRECTOR.tilt+z module, based on patented technology, measures the horizontal and vertical tilt angles of the eye relative to the camera axis with a resolution of 0.25°. In addition, DeyeRECTOR.tilt+z measures the camera-eye distance (z-coordinate) with an accuracy better than 50 µm.
Both the tilt angle and z-distance are determined at a unique rate of up to 500 Hz. This ensures detection of these hard-to-recognize and often neglected eye movements, and accurately captures the correct and full position, including the orientation of the eye.
Just like a fingerprint, individual patterns of the iris or sclera are extracted from images taken immediately before treatment and compared with those determined at the diagnosis before treatment. The DeyeRECTOR.ident module thus ensures correct patient and eye identification, eliminating the probability of subsequent errors.
Contact us
to discuss your ideas, new products and your exact requirements for eye tracking functionalities. Visit us in the south of Berlin and experience our DeyeRECTOR eye tracking system in action. Convince yourself of the reliability and precision of our demo system.
We look forward to your enquiry!