Light scattering from edematous human corneal grafts' microstructure: experimental study and electromagnetic modelization
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Along with the lens, the cornea is the only transparent tissue in the human body. However, the development of an edema involves structural disturbances increasing light scattering and leading to the opacification of the cornea. Several mechanisms of transparency loss have been studied in the literature, but the whole phenomenon is complex and the part played by each scatterer is still unclear. We propose here to study human corneal grafts combining microscopic OCT imagery with far-field measurement of the scattered light in the reflected half-space. We introduce afterwards numerical calculations based on electromagnetic equations solved with first order approximation to link the observed microscopic-scale structural modifications with the intensity level of the scattered light, and to try and quantify the relationship between them.
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In corneal oedema (bullous keratopathy, Fuch's dystrophy), local decreases in refractive index are caused by pooling of fluid into lakes; the influx of fluid also disrupts fibril organisation and reduces destructive interference of scattered light.
“A similar effect occurs in corneal oedema (bullous keratopathy, Fuch's dystrophy) but in this case there are local decreases in refractive index caused by pooling of fluid into so-called “lakes” (Casadessus et al., 2012) (Fig. 8). The influx of fluid into the stroma also leads to disruption of the fibril organisation and thus to the reduction in destructive interference of scattered light.”
From Corneal structure and transparency (2015) · cites this paper as Casadessus et al., 2012
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Corneal structure and transparency
Meek, K. M., & Knupp, C. (2015) · Progress in Retinal and Eye Research · doi:10.1016/j.preteyeres.2015.07.001 · Cited by 853 · see citing works
- Authors
- Casadessus, O., Georges, G., Lamoine, L. S., Deumié, C., & Hoffart, L.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Aix-Marseille Université (FR)
- Corresponding author
- Casadessus, Olivier
- ORCID
- Hoffart, Louis
- Venue
- Biomedical Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2012-07-02
- Volume
- 3
- Issue
- 8
- Pages
- 1793
- ISSN
- 2156-7085 (ISSN-L)
- PMC
- PMC3409700
- OpenAlex
- W2090155169
- Cited by
- 13
- References
- 0
- Citations by year
- 2026: 1 · 2023: 1 · 2021: 1 · 2019: 2 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 2 · 2013: 1
- FWCI
- 0.73
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Biomedical Optics Express (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- HAL (submittedVersion, other-oa)
- Funders
- Etablissement Français du Sang
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Optical Coherence Tomography Applications
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Corneal surgery and disorders
- Physical Sciences › Engineering › Biomedical Engineering › Optical Polarization and Ellipsometry
- Keywords
- corneal edema, corneal graft, light scattering, corneal microstructure, optical coherence tomography, electromagnetic simulation, first-order approximation, corneal opacity
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