Originally Posted by Frodo

As rfriel pointed out, this "staining" actually measures damage to the cornea by contact lenses. Now, this is very minor damage, tiny scratches and scrapes that can only be seen with this special dye or "stain". However, even those tiny scrapes can be painful. Less staining means less damage and obviously we want to keep that to a minimum. So in general, when you look at the staining grid, the contact lens/solution combinations that have the green squares would be the most comfortable. Acuvue Oasys with Unisol 4 saline solution would be a good combination, for example.