Grow - Star of Bethlehem

This one is a treasure i'm sharing. West Indies' Star of Betlehem (Isotoma longiflora).

While wikipedia say its weed can cause blindness, but with a drop and wash-wipe recipe, i've heard some people use it as herbal eye drops, even to cure cataract! I like the fact its flower blooming all the time, we have a line of this and it looks pretty at our backyard.