drusen
Noun (plural form, often used with a plural verb): 1. Small, yellowish deposits of extracellular material: Drusen are tiny accumulations of lipids, proteins, and cellular debris that form between the retinal pigment epithelium (RPE) and Bruch's membrane, a layer beneath the retina in the eye. 2. A clinical sign of age-related macular degeneration (AMD): The presence of drusen, particularly larger or numerous ones, is a primary diagnostic indicator of early or intermediate AMD, a leading cause of vision loss in older adults.
Drusen is a medical term used almost exclusively in ophthalmology and optometry. It is a plural noun (the singular is "druse," though this is rarely used). It typically refers to the physical deposits observed during an eye examination. * The ophthalmologist noted several drusen in the patient's retina during the dilated eye exam. * The presence of large, soft drusen is a significant risk factor for the progression of age-related macular degeneration. * Research focuses on understanding what causes drusen to form and how they contribute to retinal disease.
- Hard Drusen: Small, distinct, and well-defined yellow spots. They are common with aging and may not always indicate a high risk for advanced AMD.
- Soft Drusen: Larger, paler, and with less distinct edges. Their presence, especially if numerous or confluent (merging together), is associated with a higher risk of progression to advanced AMD (geographic atrophy or neovascular AMD).
- Subretinal Drusenoid Deposits (SDD) / Reticular Pseudodrusen: A different type of deposit located above the RPE, within the layers of the retina itself. They are also a high-risk feature for AMD progression.
- Druse (noun, singular): The singular form of "drusen," rarely used in clinical practice.
- Maculopathy (noun): A general term for any disease of the macula, the central part of the retina. Drusen are a feature of certain maculopathies.
- Bruch's Membrane (noun): The inner layer of the choroid, located between the RPE and the choroidal capillaries. Drusen accumulate between the RPE and this membrane.
- Retinal deposits: A more general, descriptive term.
- Extracellular deposits: A technical term highlighting their location outside of cells.
- There are no specific idioms or phrasal verbs associated with this highly technical medical term.
- The word's etymology is from German , meaning "geode" or "crystalline crust," due to the glittering appearance sometimes seen under the microscope.
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(plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina
