Residual Iris Retraction Syndrome After Artificial Iris Implantation.

To evaluate the effect of an artificial iris implant on the remnant iris. Interventional case series. Setting: Single center. Forty-two consecutive patients. Morphologic evaluation over 24 ± 14 months. Remnant pupillary aperture, iris color, visual acuity, intraocular pressure, and endothelial cell count. In 7 of 42 cases (16.7%), the residual iris aperture dilated from 36.6 ± 15.4 mm The implantation of an artificial iris prosthesis can lead to a residual iris retraction syndrome. It is likely that residual iris is trapped in the fissure between the artificial iris and the anterior chamber angle, preventing further pupil constriction. Another possibility could be a constriction or atrophy of the residual iris. A scleral-sutured implant and an implantation in the capsular bag were both found to prevent the iris retraction. The study group number is inadequate to allow statistical comparison of these different implantation methods. As the use of artificial irises increases, we may expect more patients with iris retraction syndrome in the future.

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