(redirected from soft drusen)
Also found in: Dictionary, Thesaurus, Medical.
Related to soft drusen: Retinal drusen


A proteinaceous material that passes through blood vessel walls into the surrounding tissue in inflammation or a superficial lesion.
Any substance that is exuded.



fluid exuded by small blood vessels during an inflammation that contains protein, leukocytes, erythrocytes, minerals, cellular elements and, frequently, the microbes that caused the inflammation. Any inflammation may give rise to an exudate, which will saturate the surrounding tissues or collect in the body cavities. By compressing the surrounding organs and tissues an exudate may interfere with their function. An exudate helps to spread the infection when it escapes into the tissues from the focus of inflammation. There are serous, purulent, bloody, and fibrinous exudates, depending on the dominant elements. If treated promptly and correctly, an exudate is completely resorbed without leaving any changes after it. An exudate must be distinguished from edematous fluid (transudate), which collects in the body cavities and tissue interstices following the development of an edema.

References in periodicals archive ?
Avascular PED may also occur, usually preceded by the presence of confluent soft drusen.
All centers are actively recruiting AMD patients with bilateral soft drusen (BSD), the form of "dry" AMD which is present in both eyes and are at risk of severe vision loss from progression to wet AMD.
7) Soft drusen are larger--more than 63 microns, which is half the diameter of a retinal vein as it crosses the optic disc.