What causes neovascularization of the disc?

Neovascularization of the disc (NVD) is a complication of a number of disorders that affect the eye. The most common cause of NVD is retinal vascular occlusive disease, such as diabetes and retinal vein occlusion.

What is optic disc neovascularization?

Neovascularization of the optic disc is a common manifestation of proliferative diabetic retinopathy. The neovascularization arises from the existing vascular supply of the normal optic disc and nerve fiber layer1 that includes both a uveal and retinal source.

What is glaucomatous disc?

In glaucoma, the optic nerve gets damaged. A portion of the optic nerve may be assessed during the eye exam, where it can be seen as a round structure (optic disc), with the pink or reddish section representing the neural tissue that takes the visual information to the brain.

What is disc coloboma?

Introduction. Optic disc coloboma (ODC) is a rare congenital defect resulting from incomplete proximal optic fissure closure [1, 2]. It may occur as an isolated finding or associated with other eye colobomas, including coloboma of the lens, iris coloboma, and retinochoroidal coloboma [3].

Can corneal neovascularization be reversed?

Argon laser therapy for corneal neovascularization is the use of an argon laser beam, which passes through a clear cornea, but, when there are many vessels present, the haemoglobin (within the blood) absorbs the argon energy allowing corneal vessels to coagulate, which causes reversal of the corneal neovascularization …

What causes myelinated nerve fibers in eye?

Myelinated nerve fiber layer is a developmental anomaly that results from an abnormal extension of myelination anterior to the lamina cribrosa of the sclera.

Is coloboma a rare disease?

Coloboma occurs in approximately 1 in 10,000 people. Because coloboma does not always affect vision or the outward appearance of the eye, some people with this condition are likely undiagnosed.

What is neovascularization of the disc?

Neovascularization of the disc is characterized by the development of variable caliber vessels anterior to the optic nerve or retina. They could cross over normal retinal vessels, because they grow anterior to the plane on the retina. These vessels leak profusely on angiogram.

Does neovascularization of the optic disc fill the retinal arteries?

Neovascularization of the optic disc clearly fills prior to filling of the retinal arteries, with the latter occurring at 14 seconds ( Figure 4 ). The patient underwent panretinal and focal laser photocoagulation in each eye. Figure 1. Red-free view of the left eye. Figure 2.

What is neovascularization of the optic nerve?

They could cross over normal retinal vessels, because they grow anterior to the plane on the retina. These vessels leak profusely on angiogram. Neovascularization over the nerve or within 1500 microns of the edge of the optic nerve (anything within the peripapillary field), is considered neovascularization of the disc.

What is the vascular supply of diabetic retinal vein occlusion (NVD)?

The vascular supply of NVD has been contested in the past. Asdourian et al 3 demonstrated by rapid-sequence fluorescein angiography that the uveal circulation was the primary source of NVD in several diabetic patients. Jacobs et al 4 later demonstrated a central retinal vessel source for NVD using videofluorography.