Out of 50 consecutive trabeculectomies performed over a 10-month period, 13 flat or shallow anterior chambers were reformed immediately following surgery a total of 19 times without complication at the slit lamp, using hyaluronic acid. Three months after surgery, there was no significant difference between the reformed and nonreformed eyes in terms of intraocular pressure or visual acuity change. We conclude that reformation at the slit lamp using hyaluronic acid is a safe, effective means of restoring anterior chamber anatomy following trabeculectomy.