Preliminary report of sutureless phacotrabeculectomy through a modified self-sealing scleral tunnel incision

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Abstract
A method of combined cataract extraction and trabeculectomy using phacoemulsification through a modified 5 mm sutureless scleral tunnel incision is described. In eight patients who were followed for a minimum of five months in an initial series, the intraocular pressure (IOP) decreased to less than 19 mm Hg; six achieved this result at six months on no medication. The IOP decreased from a mean of 30.88 mm Hg preoperatively to 13.75 mm Hg at two months and 14.00 mm Hg at six months. The preoperative mean of 3.63 antiglaucoma medications per patient decreased to 0.25 postoperatively. Although all patients had advanced glaucomatous optic neuropathy with a preoperative mean cup/disc ratio of 0.79, visual acuity improved in six patients; four patients had an acuity of 20/40 or better at both one week and two months. Surgically induced astigmatism averaged 0.57 diopter (D) at two months, with a mean astigmatic shift of 0.08 D with the rule at two months and 0.41 D with the rule at three months. No hypotonous or flat anterior chambers were encountered; there were visible blebs in seven patients at six months. The sutureless phacotrabeculectomy preserves all the advantages of small incision phacoemulsification and appears to be a safe and effective combined procedure for IOP control in glaucoma patients with cataracts.