Lee JO, Narasimhan V, Balakrishna A, Smith MR, Du J, Sretavan D, Choo H. Fabry-Pérot optical sensor and portable detector for monitoring high-resolution ocular hemodynamics.
IEEE PHOTONICS TECHNOLOGY LETTERS : A PUBLICATION OF THE IEEE LASER AND ELECTRO-OPTICS SOCIETY 2019;
31:423-426. [PMID:
31772487 PMCID:
PMC6879107 DOI:
10.1109/lpt.2019.2896840]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Our understanding of ocular hemodynamics and its role in ophthalmic disease progression remains unclear due to the shortcomings of precise and on-demand biomedical sensing technologies. Here, we report high-resolution in vivo assessment of ocular hemodynamics using a Fabry-Pérot cavity-based micro-optical sensor and a portable optical detector. The designed optical system is capable of measuring both static intraocular pressure and dynamic ocular pulsation profiles in parallel. Through a dynamic intensity variation analysis method which improves sensing resolution by 3-4 folds, our system is able to extract systolic/diastolic phases from a single ocular pulsation profile. Using a portable detector, we performed in vivo studies on rabbits and verified that ophthalmic parameters obtained from our optical system closely match with traditional techniques such as tonometry, electrocardiography, and photo-plethysmography.
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