Pupil motion analysis and tracking in ophthalmic systems equipped with wavefront sensing technology

Area of Science:

• Ophthalmic optics
• Biomedical engineering
• Vision science

Background:

• Ophthalmic systems using wavefront technology are sensitive to eye and head movements.
• Such motion can degrade system performance, increase complexity, and raise costs by shifting the entrance pupil.

Purpose of the Study:

• To characterize eye pupil motion in an aberrometry setting.
• To inform the design considerations for future ophthalmic systems.
• To demonstrate a novel, efficient, and cost-effective method for tracking pupil motion.

Main Methods:

• Utilized a custom, high-speed pupil tracker operating at 478 Hz.
• Employed a custom-built Hartmann-Shack sensor for direct pupil motion tracking at 236 Hz.

Main Results:

• Characterized pupil motion dynamics relevant to ophthalmic aberrometry.
• Demonstrated the feasibility of direct pupil motion tracking with a Hartmann-Shack sensor.
• Identified benefits of the proposed tracking method over existing approaches.

Conclusions:

• High-speed pupil tracking is crucial for understanding motion artifacts in ophthalmic systems.
• Direct tracking using Hartmann-Shack sensors offers an efficient and cost-effective solution.
• Findings guide the development of more robust and accessible future ophthalmic technologies.