an intraocular-lens abrasion test , vital dye staining , and scanning electron microscopy were used for an in vitro comparison of endothelial protection offered by four viscous solutions of 1 % sodium hyaluronate ( healon ) , 3 % sodium hyaluronate ( amvisc ) , 4 % chondroitin sulfate ( viscoat ) , and 2 % methylcellulose .
C0020196
hyaluronate
C0087000
sodium