The Argentinan Flag sign more commonly occurs in patients with mature nuclear sclerosis. The anterior capsule is stained with trypan blue (Vison Blue). When the capsule is decompressed with a 25G bent needle , milky lens material may obscure visualisation. As the capsular bag is under increased pressure, the tear propagates to the equator. It is similar in appearance to the blue-white-blue striped Argentinian flag,