Inadvertent filtering blebs following cataract extraction

An inadvertent filtering bleb is a complication of cataract extraction that typically occurs during the first few months of the postoperative period. These blebs may be leaking or nonleaking. The sequelae are discussed for both types, with the former being more threatening. Different aspects of cataract surgery may raise or lower their incidence, although newer techniques have reduced its risk. Two atypical cases are presented.