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Occult type 1 with PED (a type of wet ARMD) |
Fibrovascular retinal pigment epithelial detachment (PED): Occult CNV type 1 |
In a few unlucky people, the dry macular degeneration turns into this type. Occasionally, there may have been no obvious 'dry' changes visible before this develops. In this type the damaged area looks like a dome. Fluid leaks under the retina, hence the term 'wet'. Laser has been tried in this condition but is not helpful. Without the anti-VEGF drugs the condition tends to progress and central vision becomes very poor. Treatment (Lucentis, Avastin) often helps but is not always effective. Occasionally these drugs can cause the retina to 'rip', causing more loss of sight. See a case . There are 3 types of PED, reviewed here (avascular, occult, polypoidal), and here with OCT a photo. Generally ARMD with a PED is classified as 'occult' CNV, type 1. There is another type of PED without any vascular element. In younger patients this is usually part of Central Serous Retinopathy. |
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