Several months ago, my sister had surgery on both eyes. The diagnosis was that she would be blind. Thereafter, I shared my X20 and instructed her to drop a fresh sachet in a bottle of water each day.  A few weeks later, she was able to start seeing images. Because staying hydrated is essential, it plays a crucial part in our eyesight. To fast forward to date, her eyes are better and she is talking a about buying a new car to drive.