My mum showed me this product after I started getting really bad red eyes, which are not only embarrasing, but really annoying. The Prefrin eye drops from the get go are really effective, two little drops in each eye helps relieve the blood build up in the eye causing quick results clearing the eye. The eye drops tend to be very fast effective, however they do not last long I've found out. I used to put this product in my eyes before every day at school, however it would almost run out and I'd get the red eyes back just before it starts which is REALLY annoying - but this may have been due to the extremities of my infection. From what I've heard from my mum, the bottle only cost $20, which is a good price to save embarrasment I think. I do recommend this product for people who are looking for quick/short relief.