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Drusen, from the German word for node or geode (singular, "Druse"), are tiny yellow or white accumulations of extracellular material that build up between Bruch's membrane and the retinal pigment epithelium of the eye. The presence of a few small ("hard") drusen is normal with advancing age, and most people over 40 have some hard drusen. [1]
In children, optic disc drusen are usually buried and undetectable by fundoscopy except for a mild or moderate elevation of the optic disc. With age, the overlying axons become atrophied and the drusen become exposed and more visible. They may become apparent with an ophthalmoscope and some visual field loss at the end of adolescence. [7]
If normal retinal reception and image transmission are sometimes possible in a retina when high concentrations of drusen are present, then, even if drusen can be implicated in the loss of visual function, there must be at least one other factor that accounts for the loss of vision.
It’s costly, and the results aren’t always guaranteed, meaning conceiving a child afterward can be a struggle. If you’re considering a vasectomy with the idea of maybe getting it reversed ...
Druse can refer to: Druze or Durzi, a Middle Eastern religious community; Druse (botany), an aggregation of calcium oxalate crystals found in certain plants; Druse (geology), an incrustation of small crystals on the surface of a rock or mineral; Drusen, pathological deposits in the eye
An example, in English, of boustrophedon as used in inscriptions in ancient Greece (Lines 2 and 4 read right-to-left.) Boustrophedon (/ ˌ b uː s t r ə ˈ f iː d ən / [1]) is a style of writing in which alternate lines of writing are reversed, with letters also written in reverse, mirror-style.
Perhaps you've also heard the term "reverse racism" in the media, on Instagram, at work or in pockets of mostly white communities in recent weeks. Before understanding the concept of "reverse ...
Devolution, de-evolution, or backward evolution (not to be confused with dysgenics) is the notion that species can revert to supposedly more primitive forms over time. The concept relates to the idea that evolution has a divine purpose and is thus progressive (orthogenesis), for example that feet might be better than hooves, or lungs than gills.