This video created by Aravind Eye Hospital and featured on eyetube.net shows how to perform SICS surgery safely on hard cataracts. The large and hard nucleus on brunescent cataracts creates issues because it “requires a large section, large rhexis, and careful protection of endothelium.”
Citation: Mehta, Prathmesh. “Brunescent Cataract SICS.” eyetube.net. 01 January 2016.