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Macular hard drusen in the right eye. 65-year-old diabetic woman. 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 ...
It is located nasally and slightly inferior to the macula of the eye. There is a blind spot at the optic disc because there are no rods or cones beneath it to detect light. The central retinal artery and vein can be seen in the middle of the disc as it exits the scleral canal with the optic nerve to supply the retina. The vessels send branches ...
NAION usually presents suddenly as painless vision loss in one eye, often noticed upon waking up. The visual field defects can vary, and while some patients may experience immediate maximal vision loss, others may notice a gradual worsening. The optic disc in these cases can appear swollen, sometimes accompanied by hemorrhages. [41]
In dry macular degeneration, which occurs in 85–90 percent of AMD cases, drusen spots can be seen in Fundus photography [citation needed] Using an electroretinogram , points in the macula with a weak or absent response compared to a normal eye may be found [ citation needed ]
Diabetic retinopathy (also known as diabetic eye disease) is a medical condition in which damage occurs to the retina due to diabetes. It is a leading cause of blindness in developed countries and one of the lead causes of sight loss in the world, even though there are many new therapies and improved treatments for helping people live with ...
Strongly modulated blood flow pulse in central and branch arteries can result from hypertension. Microangiography by laser Doppler imaging [3] may reveal altered hemodynamics non-invasively. Mild signs of hypertensive retinopathy can be seen quite frequently in normal people (3–14% of adult individuals aged ≥40 years), even without ...
Fundus photography involves photographing the rear of an eye, also known as the fundus. Specialized fundus cameras consisting of an intricate microscope attached to a flash enabled camera are used in fundus photography. The main structures that can be visualized on a fundus photo are the central and peripheral retina, optic disc and macula.
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