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A new device to assess static ocular torsion
Stefano Ramat1, Alessandro Nesti, Maurizio Versino
1Department of Computer and Systems Science, University of Pavia, Pavia, Italy. stefano.ramat@unipv.it
Annals of the New York Academy of Sciences
|September 29, 2011
Summary
A new system accurately measures ocular torsion (centro-cecal axis rotation; CCAR) using low-cost hardware and an adaptive algorithm. This reliable method shows excellent results for healthy subjects, consistent with existing literature.
Area of Science:
- Ophthalmology
- Medical Devices
- Neuroscience
Background:
- Static ocular torsion is clinically assessed using fundus photography.
- Measuring the centro-cecal axis rotation (CCAR) is crucial for this assessment.
- Existing methods may have limitations in accessibility or precision.
Purpose of the Study:
- To develop and validate a novel, low-cost system for precise CCAR measurements.
- To evaluate the reliability and accuracy of the developed system.
- To compare the system's performance against traditional fundus photography.
Main Methods:
- Development of a system using commercial hardware and an adaptive research algorithm.
- The algorithm uses bright dots on a monitor to delineate the blind spot and determine CCAR.
- Testing involved 10 healthy subjects with multiple CCAR measurements per subject.
Main Results:
- The system demonstrated high reliability, with excellent intraclass correlation coefficients.
- Mean ocular torsion measurements were 6.4° in the right eye and 6.7° in the left eye (excyclophoria).
- These findings align with established values reported in ophthalmic literature.
Conclusions:
- The developed low-cost system provides a reliable and accurate method for measuring ocular torsion (CCAR).
- This technology offers a promising alternative for clinical assessment of static ocular torsion.
- The system's excellent reliability supports its potential for widespread use in ophthalmology.