GNAQ and Sturge-Weber syndrome: Sturge-Weber syndrome (SWS) is a congenital, non-hereditary disorder that is characterized by a facial port-wine stain, affects approximately 1 in 20,000 to 50,000 live births, and is related to a somatic mutation in the GNAQ gene.[1] The classical facial port-wine stain, involving the branch of the trigeminal nerve and the embryonic vasculature distribution in this area, induces certain ophthalmic complications of the anterior segment entailing the eyelids and conjunctiva.