Share Email Print
cover

Proceedings Paper

Synchronous imaging of the pulse response of the ciliary muscle and lens with SD-OCT (Conference Presentation)
Author(s): Yu-Cherng Chang; Alex Pham; Siobhan Williams; Karam A. Alawa; Carolina de Freitas; Marco Ruggeri; Jean-Marie A. Parel; Fabrice Manns

Paper Abstract

Purpose: To determine the dynamic interaction between ciliary muscle and lens during accommodation and disaccommodation through synchronous imaging of ciliary muscle and lens response to pulse stimulus Methods: The ciliary muscle and lens were imaged simultaneously in a 33 year old subject responding to a 4D pulse stimulus (accommodative stimulus at 1.7 s, disaccommodative stimulus at 7.7 s) using an existing imaging system (Ruggeri et al, 2016) consisting of an Anterior Segment Optical Coherence Tomography system, Ciliary Muscle Optical Coherence Tomography system, and custom-built accommodation module. OCT images were recorded at an effective frame rate of 13.0 frames per second for a total scan time of 11.5 s. An automated segmentation algorithm was applied to images of the anterior segment to detect the boundaries of the cornea and lens, from which lens thickness was extracted. Segmentation of the ciliary muscle was performed manually and then corrected for distortion due to refraction of the beam to obtain measurements of thicknesses at the apex and fixed distances from the scleral spur. Results: The dynamic biometric response to a pulse stimulus at 4D was determined for both the ciliary muscle and lens, suggesting the ciliary muscle and lens interact differently in accommodation and disaccommodation. Conclusions: The study introduces new data and analyses of the ciliary muscle and lens interaction during a complete accommodative response from the relaxed to the accommodated state and back, providing insight into the interplay between individual elements in the accommodative system and how their relationships may change with age.

Paper Details

Date Published: 16 May 2017
PDF: 1 pages
Proc. SPIE 10045, Ophthalmic Technologies XXVII, 100451G (16 May 2017); doi: 10.1117/12.2256323
Show Author Affiliations
Yu-Cherng Chang, Ophthalmic Biophysics Ctr., Univ. of Miami Miller School of Medicine (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Alex Pham, Ophthalmic Biophysics Ctr., Univ. of Miami Miller School of Medicine (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Siobhan Williams, Ophthalmic Biophysics Ctr., Bascom Palmer Eye Institute (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Karam A. Alawa, Ophthalmic Biophysics Ctr., Bascom Palmer Eye Institute (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Carolina de Freitas, Ophthalmic Biophysics Ctr., Bascom Palmer Eye Institute (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Marco Ruggeri, Ophthalmic Biophysics Ctr., Bascom Palmer Eye Institute (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Jean-Marie A. Parel, Ophthalmic Biophysics Ctr., Bascom Palmer Eye Institute (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)
Vision Cooperative Research Ctr. (Australia)
Fabrice Manns, Ophthalmic Biophysics Ctr., Bascom Palmer Eye Institute (United States)
Biomedical Optics and Laser Lab., Univ. of Miami (United States)


Published in SPIE Proceedings Vol. 10045:
Ophthalmic Technologies XXVII
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

© SPIE. Terms of Use
Back to Top