Results 141 to 150 of about 5,820 (173)

Foveal avascular zone and foveal pit formation after preterm birth

British Journal of Ophthalmology, 2012
Vascularisation of the macula takes place between 24 and 27 weeks post-conception. Preterm birth may affect the formation of the foveal avascular zone (FAZ) and foveal depression, and displacement of inner retinal layers away from the incipient fovea.To examine whether vascular abnormalities accompany an inner retinal abnormality, and whether they are ...
Susan E, Yanni, Jingyun, Wang, Melody, Chan, Joseph, Carroll, Sina, Farsiu, Joel N, Leffler, Rand, Spencer, Eileen E, Birch   +7 more
openaire   +2 more sources

[Does the Foveal Avascular Zone Change in Glaucoma?]

Klinische Monatsblatter fur Augenheilkunde, 2020
The foveal avascular zone (FAZ) - with perimeter and acircularity index (AI) and surrounding vessel density - are measured in glaucomatous eyes in comparison to healthy eyes - with additional subdivision into visual field defects in different locations (central vs. peripheral).The data from 128 eyes were evaluated.
Claudia, Lommatzsch, Carsten, Heinz, Joerg Michael, Koch, Britta, Heimes-Bussmann, Ursula, Hahn, Swaantje, Grisanti   +5 more
openaire   +2 more sources

Entoptic Foveal Avascular Zone Measurement and Diabetic Retinopathy

Optometry and Vision Science, 1999
ABSTRACT: Background: Entoptic visualization of the foveal avascular zone (FAZ) provides a noninvasive method for measurement of the FAZ. To determine if repeatability of measurement with this technique is good enough to monitor changes in diabetic retinopathy, we quantify (1) the repeatability
G, Hilmantel, R A, Applegate, W A, van Heuven, S P, Stowers, A, Bradley, B L, Lee   +5 more
openaire   +2 more sources

Foveal Avascular Zone Diameter and Sickle Cell Disease

Archives of Ophthalmology, 1991
Patients with sickle cell disease can have a distinct retinopathy in which the posterior pole shows abnormalities, including perifoveolar vascular abnormalities. The foveal avascular zone (FAZ) was examined using fluorescein angiography in patients with sickle cell disease and in healthy normal controls.
R J, Sanders, G C, Brown, R B, Rosenstein, L, Magargal   +3 more
openaire   +2 more sources

Age and Gender Influence on Foveal Avascular Zone in Healthy Eyes

Experimental Eye Research, 2019
The foveal avascular zone (FAZ) is the capillary-free area in the central macula with high photoreceptor density and metabolic activity. In the present study we measured the superficial and deep macular foveal avascular zone (sFAZ, dFAZ) in the eyes of healthy adults of both sexes of various ages ranging from 10 to 69 years using optical coherence ...
Maribel Fernández, Francisco Gonzalez, José Manuel Abalo-Lojo   +2 more
exaly   +3 more sources

The Foveal Avascular Zone Image Database (FAZID)

Applications of Digital Image Processing XLIII, 2020
The Foveal Avascular Zone (FAZ) is of clinical importance since the vascular arrangement around the fovea changes with disease and refractive state of the eye. Therefore, it is important to segment and quantify the FAZ accurately. Studies done to date have achieved reasonable segmentation but there is a need for considerable improvement.
Arpit Agarwal, Jothi Balaji Janarthanam, Rajiv Raman, Vasudevan Lakshminarayanan   +3 more
openaire   +1 more source

Automatic detection and measurement of foveal avascular zone

Proceedings of the Twentieth National Radio Science Conference (NRSC'2003) (IEEE Cat. No.03EX665), 2003
This paper describes a new digital image processing algorithm which is concerned with the automatic detection and measurement of the foveal avascular zone (FAZ) in Fundus Fluorescein Angiographies (FFA). FFA is used in ophthalmic practice to evaluate vascular retimpathies and choroidopathies.
M. Eladawy, S.M.S. Karawya, M. Elbably, N.M.A. Salem   +3 more
openaire   +1 more source

FOVEAL AVASCULAR ZONE VOLUME

Retina, 2020
Purpose: To propose a new clinical evaluation index, foveal avascular zone (FAZ) volume, and analyze its statistical significance. Methods: A semiautomatic method is proposed to measure the FAZ volume in optical coherence tomography angiography images as follows: The region of ...
Qiuzhuo, Xu, Weiwei, Zhang, Hongjing, Zhu, Qiang, Chen   +3 more
openaire   +2 more sources

A small foveal avascular zone may be an historic mark of prematurity

Ophthalmology, 1999
To compare in children the area and diameter of the foveal avascular zone (FAZ) of former preterm infants, when no significant retinopathy of prematurity (ROP) developed, to the area and diameter of the FAZ of former term infants.Retrospective observational case series and literature review.Forty-nine children (39 former preterm infants and 10 former ...
H A, Mintz-Hittner, D M, Knight-Nanan, D R, Satriano, F L, Kretzer   +3 more
openaire   +2 more sources

Metabolic factors and the foveal avascular zone of the retina in diabetes mellitus

Diabetes & Metabolism, 2005
To study the foveal avascular zone (FAZ) of the central retina in diabetic patients with retinopathy having undergone metabolic evaluation.One hundred and ten digital fluorescein angiograms were chosen from our digital image bank after cross matching diabetic patient lists of the ophthalmology and endocrinology departments of our institution.
J, Conrath, R, Giorgi, B, Ridings, D, Raccah   +3 more
openaire   +2 more sources