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.
The popliteal artery is located behind the knee in. the popliteal fossa and is a direct extension of the. superï¬cial femoral artery after it passes through. the adductor hiatus, an opening in the tendinous. slip of the great adductor muscle of the thigh. The. popliteal artery lies posterior to the femur and.