High-speed, image-based eye tracking with a scanning laser ophthalmoscope

• Published in: Biomedical optics express Vol. 3; no. 10; pp. 2611 - 2622
• Main Authors: Sheehy, Christy K, Yang, Qiang, Arathorn, David W, Tiruveedhula, Pavan, de Boer, Johannes F, Roorda, Austin
• Format: Journal Article
• Language: English
• Published: United States Optical Society of America 01.10.2012
• Subjects: Ophthalmology Applications; (330.4460) Ophthalmic optics and devices; (330.2210) Vision - eye movements; (170.4460) Ophthalmic optics and devices
• ISSN: 2156-7085; 2156-7085
• DOI: 10.1364/BOE.3.002611

We demonstrate a high-speed, image-based tracking scanning laser ophthalmoscope (TSLO) that can provide high fidelity structural images, real-time eye tracking and targeted stimulus delivery. The system was designed for diffraction-limited performance over an 8° field of view (FOV) and operates with a flexible field of view of 1°-5.5°. Stabilized videos of the retina were generated showing an amplitude of motion after stabilization of 0.2 arcmin or less across all frequencies. In addition, the imaging laser can be modulated to place a stimulus on a targeted retinal location. We show a stimulus placement accuracy with a standard deviation less than 1 arcmin. With a smaller field size of 2°, individual cone photoreceptors were clearly visible at eccentricities outside of the fovea.