Inclusion Criteria:

• Ability to provide written informed consent and comply with study assessments for the full duration of the study
• Age > 40 years
• Patients with Open-angle Glaucoma who have had trabeculectomy
• Patients determined to have failing bleb with presence of superficial bleb vascularity and IOP increase on 3 successive visits without topical medication
• Patients whose intraocular pressure (IOP) is above goal IOP after suture lysis and digital compression have been attempted

Exclusion Criteria:

• Pregnancy (positive pregnancy test) or lactation.
• Premenopausal women not using adequate contraception. The following are considered effective means of contraception: surgical sterilization or use of oral contraceptives, barrier contraception with either a condom or diaphragm in conjunction with spermicidal gel, an IUD, or contraceptive hormone implant or patch.
• Current infection or inflammation in either eye
• Any abnormality preventing reliable applanation tonometry in either eye
• Other non-glaucomatous disease affecting visual field, (pituitary lesions, demyelinating disease, congenital optic nerve anomaly, prior retinal and optic nerve vascular occlusive disease, retinal dystrophy and degeneration, diabetes and HIV and AIDS infection)
• Strabismus, nystagmus, monocular patient
• Prior enrollment in the study
• Any other condition that the investigator believes would pose a significant hazard to the subject if the investigational therapy were initiated
• Participation in another simultaneous medical investigation or trial