Abstract: A pharmaceutical composition useful in the prevention of subconjunctival scarring that may occur after GFS comprising an effective amount of an ALK-5 inhibitor. Also disclosed is a method of treating disorder or condition of other ocular scarring or fibrosis including corneal haze and PVR that may develop after ocular surgery or injury comprising applying an amount of a pharmaceutical composition including an ALK-5 inhibitor to a post-surgical or injury site.