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Proceedings Paper

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

Paper Details

Date Published: 26 April 2016
PDF: 1 pages
Proc. SPIE 9693, Ophthalmic Technologies XXVI, 969315 (26 April 2016); doi: 10.1117/12.2218145
Show Author Affiliations
Carolina De Freitas, Bascom Palmer Eye Institute (United States)
Victor M. Hernandez, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Marco Ruggeri, Bascom Palmer Eye Institute (United States)
Heather A. Durkee, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Siobhan Williams, Bascom Palmer Eye Institute (United States)
Univ. of Miami (United States)
Giovanni Gregori, Bascom Palmer Eye Institute (United States)
Arthur Ho, Bascom Palmer Eye Institute (United States)
Brien Holden Vision Institute (Australia)
Fabrice Manns, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Jean-Marie Parel, Bascom Palmer Eye Institute, Univ. of Miami (United States)
Brien Holden Vision Institute, Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 9693:
Ophthalmic Technologies XXVI
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

Video Presentation

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