A friend gave me some Japanese eye drops made by Rohto (Osaka, Japan) called Zi:0. Now, I’ve used ‘cool’ eye drops before, you know that kind of menthol cooling, but this is cooling on a whole new level.
At first, putting these drops in my eyes I’d describe the feeling more as a deep burning than a cooling sensation. It’s so strong you can barely open your eyes at first. Following this, the drops mixed with tears stream out of your eyes! By the time you can actually open your eyes properly the cooling sensation overcomes the burning and like it says on the box, ‘My eyes are purified… like the eyes of a newborn baby’.