Ciliary block or malignant glaucoma is thought to be caused by the misdirec
tion of aqueous into the vitreous. It is refractory to medical treatment an
d often requires vitreous aspiration. We present a case of ciliary block gl
aucoma caused by sodium chondroitin sulfate-sodium hyaluronate (Viscoat(R))
gaining access to the vitreous through an unsuspected, small zonular dialy
sis. Vitrectomy performed through a peripheral iridectomy resolved this sev
ere condition.