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Surgical management of overhanging blebs after filtering procedures.

• Large filtering blebs overhanging the cornea were managed surgically in 16 eyes. Good filtration and glaucoma control were maintained in all but one eye. This eye had had endophthalmitis unrelated to surgical correction of the bleb. Symptoms owing to the blebs were relieved in all eyes. Such overhanging blebs often have been mistaken for dissection of the filtering area into the cornea. Actually, however, they represent filtering blebs that are gradually massaged downward over the cornea by lid movements. They can be reflected from the cornea by an iris spatula. The redundant tissue then can be excised and the free edges sutured with 8-0 silk. The technique is safe and reliable.