A Geometrical Approach to Human Saccade Simulation.

Area of Science:

• Biomechanics
• Computational Neuroscience
• Ophthalmology

Background:

• Accurate human eye movement simulation is crucial for various applications.
• Existing models struggle with secondary and tertiary eye movements and exhibit mathematical complexity.
• Advanced modeling techniques are necessary to accurately represent eye behavior.

Purpose of the Study:

• To introduce a novel geometrical modeling procedure for simulating human eye movements in binocular vision.
• To address limitations in current models, particularly for secondary and tertiary eye movements.
• To provide a sophisticated technique for investigating eye movements using OpenSim and MATLAB.

Main Methods:

• Utilized geometrical modeling via an OpenSim script with MATLAB binding for eye movement simulation.
• Implemented first-order neural dynamics and Millard's muscle model to actuate the six Extra Ocular Muscles (EOMs).
• Employed pulse-step inputs to generate muscle forces around the eye globe for simulation.

Main Results:

• The implemented model successfully simulated horizontal and vertical human eye movements based on prescribed activation.
• The developed technique demonstrated efficacy in replicating eye motion dynamics.
• Model performance was validated against lumped parameter models and electrooculography (EOG) recordings.

Conclusions:

• The proposed geometrical modeling procedure offers a viable method for accurate human eye movement simulation.
• This approach enhances the simulation of eye movements, particularly addressing challenges with secondary and tertiary motions.
• The OpenSim-MATLAB framework provides a powerful tool for advancing research in eye movement modeling and biomechanics.