Exclusion criteria
congenital anomalies, thyroid eye disease, glaucoma, traumatic
NEOVASCULAR GLAUCOMA, TUMOR, THYROID EYE DISEASE, GLAUCOMA, ANGLE-CLOSURE GLAUCOMA, STURGE-WEBER SYNDROME
Eyes with prior glaucoma filtration surgery, angle-closure glaucoma, traumatic, malignant, uveitic, or neovascular glaucoma or other discernible congenital anomalies of the anterior chamber angle were not allowed to participate. Patients with retrobulbar tumor, thyroid eye disease, Sturge-Weber Syndrome or any other type of condition that may have caused elevated episcleral venous pressure were excluded. Study participation also was not allowed for any patient having a contraindicated ocular or systemic condition.