one of several charts used in testing visual acuity. Letters, numbers, or symbols are arranged on the chart in decreasing size from top to bottom. A wall chart developed by a Dutch ophthalmologist Hermann Snellen in the 19th century, which is still used today to measure visual acuity.
Popliteal Nodes. The popliteal nodes, or popliteal lymph nodes, include six or seven nodes and are located in the legs near the knees at the popliteal fossa.They service the lower legs and feet for the lymphatic system.opliteal Nodes. The popliteal nodes, or popliteal lymph nodes, include six or seven nodes and are located in the legs near the knees at the popliteal fossa.
There are about three to five of these nodes. Cloquet's node is the name of the top-most deep inguinal lymph node, which is located below the inguinal ligament. These nodes drain first to the body's external iliac lymph nodes, second to the pelvic lymph nodes, and finally to the paraaortic lymph nodes.