Patanjali drishti is not at all a good buy.The tingling sensation that is being produced after putting these drops is really irritating.It does not give a soothing and calming effect to your eyes. And if you put these drops at night, you will feel as if your eyes are being sticked when you wake up.This is not a good feel at all. It also has some strong ingredients which does not suit to many people especially people with sensitive eyes.