Simultaneous refraction measurement and OCT axial biometry of the eye during accommodation
(Conference Presentation)

Carolina De Freitas; Victor M. Hernandez; Marco Ruggeri; Heather A. Durkee; Siobhan Williams; Giovanni Gregori; Arthur Ho; Fabrice Manns; Jean-Marie Parel

doi:10.1117/12.2218145

26 April 2016 Simultaneous refraction measurement and OCT axial biometry of the eye during accommodation (Conference Presentation)

Carolina De Freitas, Victor M. Hernandez, Marco Ruggeri, Heather A. Durkee, Siobhan Williams, Giovanni Gregori, Arthur Ho, Fabrice Manns, Jean-Marie Parel

Author Affiliations +

Proceedings Volume 9693, Ophthalmic Technologies XXVI; 969315 (2016) https://doi.org/10.1117/12.2218145
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

The purpose of this project is to design and evaluate a system that will enable objective assessment of the optical accommodative response in real-time while acquiring axial biometric information. The system combines three sub-systems which were integrated and mounted on a joystick x-y-z adjustable modified slit-lamp base to facilitate alignment and data acquisition: (1) a Shack-Hartmann wavefront sensor for dynamic refraction measurement, provided software calculates sphere, cylinder and axis values, (2) an extended-depth Optical Coherence Tomography (OCT) system using an optical switch records high-resolution cross-sectional images across the length of the eye, from which, dynamic axial biometry (corneal thickness, anterior chamber depth, crystalline lens thickness and vitreous depth) can be extracted, and (3) a modified dual-channel accommodation stimulus unit based on the Badal optometer for providing a step change in accommodative stimulus. The prototypal system is capable of taking simultaneous measurements of both the optical and the mechanical response of lens accommodation. These measurements can provide insight into correlating changes in lens shape with changes in lens power and ocular refraction and ultimately provide a more comprehensive understanding of accommodation, presbyopia and an objective assessment of presbyopia correction techniques.

Conference Presentation

Citation Download Citation

Carolina De Freitas, Victor M. Hernandez, Marco Ruggeri, Heather A. Durkee, Siobhan Williams, Giovanni Gregori, Arthur Ho, Fabrice Manns, and Jean-Marie Parel "Simultaneous refraction measurement and OCT axial biometry of the eye during accommodation (Conference Presentation)", Proc. SPIE 9693, Ophthalmic Technologies XXVI, 969315 (26 April 2016); https://doi.org/10.1117/12.2218145

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KEYWORDS

Optical coherence tomography

Refraction

Eye

Wavefront sensors

Biometrics

Data acquisition

Holmium

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