What is the foveal avascular zone?
What is the foveal avascular zone?
The foveal avascular zone (FAZ) is a region surrounding the fovea which is devoid of retinal capillaries. The role of the FAZ in vision has been investigated extensively, and it has been found that the size of the FAZ was closely related to vision and can be measured with good repeatability and reproducibility by FA8.
Why is the fovea depression?
Different shapes of foveal depression have been described in otherwise normal eyes. It has been postulated that the shape of the foveal depression might result from the balance between centrifugal forces pushing the inner retina and centripetal forces that pulling the foveal cones towards its center.
What is fluorescein angiography used for?
Fluorescein angiography is an eye test that uses a special dye and camera to look at blood flow in the retina and choroid. These are the two layers in the back of the eye.
What is foveal hypoplasia?
Foveal hypoplasia (FH) is a disorder characterized by an underdeveloped foveal pit, absence of foveal pigmentation, and/or foveal avascular zone (FAZ)1 and persistence of inner retinal layers at the fovea.
Is fluorescein angiography necessary?
Fluorescein angiograms are often recommended to follow the course of a disease and to monitor treatment results. It is particularly useful in the management of diabetic retinopathy and macular degeneration.
How does macular degeneration affect vision?
Vision with macular degeneration It causes blurred or reduced central vision, due to thinning of the macula (MAK-u-luh). The macula is the part of the retina responsible for clear vision in your direct line of sight. Dry macular degeneration may first develop in one or both eyes and then affect both eyes.
Is macula avascular?
The macula in humans has a diameter of around 5.5 mm (0.22 in) and is subdivided into the umbo, foveola, foveal avascular zone, fovea, parafovea, and perifovea areas….
| Macula of retina | |
|---|---|
| The macula sits near the centre of the retina of the human eye. | |
| Details | |
| Part of | Retina of Human eye |
| System | Visual system |
Is foveal hypoplasia progressive?
The disease is recurrent and progressive and there is usually asymmetry between the two eyes. Non-penetrance and considerable variation in expression have been reported. Acute episodes are characterized by photophobia, tearing, mucous discharge, and punctate keratitis.
