Search results for "retinal imaging"
showing 4 items of 4 documents
Retinal Imaging through Phakic Iris-Claw IOL.
2014
AbstractBackground: Phakic anterior chamber iris-fixated IOL (PIOL) are established for the correction of high myopia. These patients require attention to macular pathologies. This study was to evaluate the quality of imaging through the PIOLs. Methods: 54 eyes of 31 myopic and hyperopic patients with Verisyse®, Verisyse toric®, and Veriflex® phakic iris-fixated IOL were included. Mean preoperative refraction was −11.0 D and +5.7 D, respectively; mean follow-up time was 7.4 years (5–11 years). A matched control group was formed without PIOL implantation. OCT scans were performed and evaluated qualitatively and quantitatively. Results: In 52 eyes of 31 patients (96%), a 3D-OCT image and fund…
Contributions à l'analyse et à l'interprétation des images : Extraction et représentation de caractéristiques
2016
Ce mémoire, rédigé en vue de l'obtention de l'Habilitation à Diriger des Recherches (HDR), offre un aperçu des travaux de recherche et d’encadrement que j’ai pu mener depuis l'obtention de mon doctorat. Il montre la diversité des champs d’application et de recherche (en vision et en imagerie médicale) que j’ai pu couvrir , ainsi que mon implication dans l’encadrement doctoral.Mes activités de recherche se divisent en deux grandes parties. D'une part, l'analyse de scènes dynamiques, à savoir la détection de regions d'intérêt dans des séquences d'images, pour réduire la taile des données à traiter, et la détection et le suivi d'objets mobiles à l'aide de caméras de diverses natures (perspecti…
Retinal vascular imaging in cardiovascular medicine: New tools for an old examination
2017
The old concept that the eye is the only window through which the body microcirculation can be observed in life easily, safely and repeatedly is part of the cultural baggage of every physician. When Hermann von Helmholtz invented the direct ophthalmoscope in 1850, he opened the door to a non-invasive visualization of human microcirculation in vivo at the retina. Only a few years later, the Scottish ophthalmologist Marcus Gunn documented the close association between retinal changes, and renal and cardiovascular diseases (CVD) in hypertensive patient. In 1939, Keith, Wagener, and Barker showed that the severity of retinal microvascular abnormalities was predictive of mortality in patients wi…
Retinal vascular network: description in elderly and pathological process
2020
For more than 10 years, description of the retinal microvascular network has benefited from the development of new imaging techniques. Automatic retinal images analysis software, as well as OCT angiography, are able to highlight subtle and early changes in the retinal vascular network. In addition, these software allow to obtain a large amount of quantitative microvascular parameters which improve the characterization of retinal vascularization. The challenge of current research is to demonstrate the association between these microvascular modifications, systemic vascular aging process and cerebral and cardiovascular disease. Indeed, a physiopathological continuum exists between retinal mic…