foveola

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foveola

[fō′vē·ə·lə]
(biology)
A small pit, especially one in the embryonic gastric mucosa from which gastric glands develop.
References in periodicals archive ?
Wons et al., "Optical coherence tomography angiography of the foveal avascular zone in diabetic retinopathy," Graefe's Archive for Clinical and Experimental Ophthalmology, vol.
TABLE 1: Grading of foveal avascular zone using fluorescein angiography.
The top image shows the absence of the foveal avascular zone in the macular area.
Detection of vascular occlusive changes, vascular dilatation, emergence of collaterals, and microaneurysmal changes in the capillaries are the microscopic determinants of the disease.1,2 Radiation retinopathy is characterized by parenchymal inflammation, leukocyte pooling in the capillaries, glial hypertrophy, necrotic and gliotic changes, neuronal swelling and degeneration.6 Microscopic characteristics of the final phase of radiation retinopathy are co-existence of regenerated vessels and ischemic fields.7 FFA shows capillary nonperfusion, and this finding is the gold standard to demonstrate radiation retinopathy.7 Our patient had enlargement of the foveal avascular zone, perifoveal capillary telangiectasia and widespread venous beading in both eyes on FFA.
(4) important clinical landmarks within the macula are fovea, foveola and foveal avascular zone. Fovea is a depression in the inner retinal surface at the centre of the macula.
The temporal arcades approximate the macula region and within this area the central foveal avascular zone contains outer retinal layers only.
OCT-A demonstrates replacement of the normal foveal avascular zone (FAZ) by abnormal vascular bifurcations, yet this disturbance of the FAZ is associated with relatively normal foveal anatomy, as imaged by swept-source OCT, and a best-corrected visual acuity of 20/20.
FA is the gold standard imaging technique to provide the information of nonperfusion area and identify foveal avascular zone (FAZ).
Surrounding the foveal avascular zone, an abnormality of the vascular network was noted.
The foveal avascular zone (FAZ) measures approximately 0.35-0.50mm in diameter and is delineated using fluorescein angiography.