Knog Blinder Arc 5.5 as Diagnostic Tool

When warming up in the bath after this afternoon's cold and wet ride home, I was alarmed to find a large swelling on the inner aspect of my left knee. Fortunately the power of Knog allayed my fears as the photo shows. The light shines brightly through the swelling, meaning it is full of clear fluid (a technique known as transillumination). It's probably a menisceal cyst caused by an old cartilage injury from my football days and not at all serious!