Megalo-bleb phenomenon

ABSTRACT

From 1989 to 1991, ninety-six patients [41 females, 55 males] underwent 100 filtering procedures for glaucoma. The minimum follow-up period was 252 days. 68% of the patients had posterior lip sclerectomy and the rest had trabeculectomy. After three weeks, one case from each procedure group developed a large bleb which caused projection of the upper eyelid, vasodilatation and tortuosity of the conjunctival vessels. These two patients complained of a feeling of foreign body in their eyes. The cornea adjacent to the bleb was involved with dellen pit, which did not respond to conventional therapy. The intraocular pressure of the patients was about 10 mmHg and their anterior chambers were very deep. The patients' large blebs were not controlled with pressure patches or with drug therapy [acetazolamide and timolol 0.5%], and we had to aspirate the bleb. In conclusion, this phenomenon can be considered as a "megalo-bleb"