ICHF HR

High-speed OCT-based ocular biometer combined with an air-puff system for determination of induced retraction-free eye dynamics

BIOMEDICAL OPTICS EXPRESS 2019 | 10(7) | 3663-3680

Alfonso Jiménez-villar, Ewa Mączyńska, Artur Cichański, Maciej Wojtkowski, Bartłomiej J Kałużny, Ireneusz Grulkowski

Abstract:

We demonstrate a swept source OCT-based ocular biometer integrated with an airpuff stimulus to study the reaction of the eye to mechanical stimulation in vivo. The system enables simultaneous measurement of the stimulus strength and high-speed imaging of the eye dynamics along the visual axis. We characterize the stimulus and perform optimization of the data acquisition for a proper interpretation of the results. Access to the dynamics of axial eye length allows for a determination of the eye retraction, which is used to correct the airpuff induced displacement of ocular structures. We define the parameters to quantify the reaction of the eye to the air puff and determine their reproducibility in a group of healthy subjects. We observe the corneal deformation process and axial wobbling of the crystalline lens. OCT biometer combined with the air puff is the first instrument with the potential to provide comprehensive information on the biomechanics of ocular components.

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This project has received funding from the European Union’s
Horizon 2020 research and innovation programme
under grant agreement No 666295.