Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Daoud R. Iskander"'
Publikováno v:
IEEE Transactions on Biomedical Engineering. 56:1473-1481
A new method for noninvasive assessment of tear film surface quality (TFSQ) is proposed. The method is based on high-speed videokeratoscopy in which the corneal area for the analysis is dynamically estimated in a manner that removes videokeratoscopy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5703c40fe5542615fdb6429f69c8f704
https://doi.org/10.1109/tbme.2008.2011993
https://doi.org/10.1109/tbme.2008.2011993
Publikováno v:
IEEE Transactions on Biomedical Engineering. 56:493-499
High-speed videokeratoscopy is an emerging technique that enables study of the corneal surface and tear-film dynamics. Unlike its static predecessor, this new technique results in a very large amount of digital data for which storage needs become sig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0f3e656138ad6d06e32ae2c43737456
https://doi.org/10.1109/tbme.2008.2006019
https://doi.org/10.1109/tbme.2008.2006019
Publikováno v:
IEEE Transactions on Biomedical Engineering. 55:2381-2387
Videokeratoscopy techniques rely on a number of factors in order to achieve accurate estimates of corneal surface topography. Good tear film quality, minimal reflections from eyelashes, and minimal eye movements are essential for corneal topography e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f23a25bbc3aa2685e68409c7262f828c
https://doi.org/10.1109/tbme.2008.923766
https://doi.org/10.1109/tbme.2008.923766
Publikováno v:
Eye. 21:624-632
PURPOSE: To investigate fluctuations in the ocular surface, we used high-speed videokeratoscopy (50 Hz) to measure the dynamics of the ocular surface topography. METHODS: Ocular surface height difference maps were computed to illustrate the changes i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a676908dca9a1923a961e7a8737a3191
https://doi.org/10.1038/sj.eye.6702293
https://doi.org/10.1038/sj.eye.6702293
Publikováno v:
IEEE Transactions on Biomedical Engineering
High-speed videokeratoscopy (HSV) is an emerging technology that has the potential to acquire information on the dynamics of corneal topography and tear-film behavior. We show that the surface regularity and asymmetry indices, which are traditionally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8abba9b6f3b1598eaa60a117110c00ae
https://doi.org/10.1109/tbme.2005.856253
https://doi.org/10.1109/tbme.2005.856253
Publikováno v:
IEEE Transactions on Biomedical Engineering. 51:1969-1980
The optics of the human eye are not static in steady viewing conditions and exhibit microfluctuations. Previous methods used for analyzing dynamic changes in the eye's optics include simple Fourier-transform-based methods, which have been used in stu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f2312150e33638093e3c61235b5640c
https://doi.org/10.1109/tbme.2004.834254
https://doi.org/10.1109/tbme.2004.834254
Autor:
Daoud R. Iskander, Mark R. Morelande
Publikováno v:
IEEE Transactions on Signal Processing. 51:3043-3052
Two detectors of symmetrically distributed independent timing jitter in a data record composed of a complex harmonic in additive white Gaussian noise are proposed. The proposed detectors are computationally efficient, and although they are formulated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87185e0eebadb0c3fd84311a1ca55aeb
https://doi.org/10.1109/tsp.2003.818901
https://doi.org/10.1109/tsp.2003.818901
Publikováno v:
2009 IEEE/SP 15th Workshop on Statistical Signal Processing.
Modelling of interferometric signals related to tear film surface quality is considered. In the context of tear film surface quality estimation in normal healthy eyes, two clinical parameters are of interest: the build-up time, and the average interb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a39f9148961a89001779ba9bf501acd
https://doi.org/10.1109/ssp.2009.5278515
https://doi.org/10.1109/ssp.2009.5278515
Publikováno v:
IEEE transactions on bio-medical engineering. 56(3)
Corneal topography estimation that is based on the Placido disk principle relies on good quality of precorneal tear film and sufficiently wide eyelid (palpebral) aperture to avoid reflections from eyelashes. However, in practice, these conditions are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c0c50fa957429b0b790ee46da31bcec
https://pubmed.ncbi.nlm.nih.gov/19389686
https://pubmed.ncbi.nlm.nih.gov/19389686
Publikováno v:
MMSP
An optimal videokeratoscopic image presents a strong well-oriented pattern over the majority of the measured corneal surface. In the presence of interference, arising from reflections from eyelashes or tear film instability, the patternpsilas flow is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21d8ec3252b6a68f407d8cf1ca7e31a5
https://doi.org/10.1109/mmsp.2008.4665127
https://doi.org/10.1109/mmsp.2008.4665127