Pseudophakic posterior iris chafing syndrome.

Posterior iris chafing by the loop or the optic portion of sulcusfixated posterior chamber lens implants may cause a spectrum of disorders that include iris-pigment epithelial "window defects," pigment dispersion with or without elevation of intraocular pressure, intermittent microhyphemas with transient visual obscurations, and the UGH syndrome. It appears that secondary pigmentary glaucoma is more likely with planar loop design than with angulated loops. Optic and loop materials may play a role in the development of the disorder. Implantation of both supporting loops of the implant within the capsular bag is suggested to prevent posterior iris chafing.