Great for Bell's Palsy [SEP] I purchased this to help shield my eye while suffering from Bell's Palsy.  I highly recommend having one if you are going through the same.  On windy days it allows you to go outside without having to hold your eye closed.  It also, as the name suggests, holds in some moisture.  Though it fogs up a bit, this is well worth the clouded view to know that not all the moisture is lost from an eye that can't blink or make tears.  In the early weeks this allowed me to drive as taping an eye shut made my depth of field a joke.  The elastic was a bit too long for me, but I simply tied a knot in the back to make it tighter.