Open angle glaucoma. Including primary open angle glaucoma, pseudoexfoliative and pigmentary glaucoma
Intraocular pressure 18 - 40 mmHg on maximal tolerated or maximal affordable medical therapy
Informed consent given and consent form signed.
You may not be if
Unwilling or unable to give consent, unwilling to accept randomisation, or unable to return for scheduled protocol visits
Pregnant or nursing women
No light perception vision
Previous incisional intraocular surgery, other than uncomplicated clear corneal cataract surgery
Previous ocular laser in study eye
Iris neovascularisation or proliferative retinopathy
Primary angle closure or primary angle closure glaucoma
Iridocorneal endothelial syndrome or anterior segment dysgenesis
Epithelial or fibrous downgrowth
Aphakia
Chronic or recurrent uveitis
Steroid-induced glaucoma
Severe posterior blepharitis
Unwilling to discontinue contact lens use after surgery
Previous cyclodestructive procedure
Glaucoma secondary to penetrating keratoplasty, trauma, retinal disease/surgery or neovascular disease
Conjunctival scarring from prior ocular surgery, trauma or cicatrizing disease precluding a superior trabeculectomy
Need for glaucoma surgery combined with other ocular procedures (i.e. cataract surgery, penetrating keratoplasty, or retinal surgery) or anticipated need for urgent additional ocular surgery
Clareo Health | The Ghana Primary Tube Versus Trabeculectomy Study
