[An anterior chamber-subtenonian drainage tube. A long-term study].

A drainage of aqueous humor from the anterior chamber to the subtenonian space using a tube and a scleral implant was performed in 22 eyes, previously unsuccessfully operated on for glaucoma. The results after a follow up of 12 to 36 months were good, specially in cases with undissectable conjunctiva (a 73% rate of success). The small incidence of serious complications incites us to use this technique earlier in the surgical treatment of uncontrolled ocular hypertension.