Supplementary Material for: Iris chafing syndrome secondary to iridociliary adhesions in a patient with a single-piece acrylic intraocular lens

Introduction: We present a unique case of iris chafing syndrome in a patient with a complex ophthalmologic history after the successful placement of a single-piece in-the-bag intraocular lens (IOL) in an eye with healthy zonular support. Case presentation: A patient with a previous history of multiple retinal surgeries presented with pain and elevated intraocular pressure (IOP) secondary to retained viscoelastic in the anterior chamber. Following removal of the viscoelastic material in clinic, the patient underwent a combined cataract and glaucoma surgery. Subsequently, the patient developed signs and symptoms of iris chafing syndrome. Anterior segment imaging revealed the cause to be iridociliary adhesion causing an elimination of the sulcus space. Iris chafing syndrome was suspected when the patient presented post-operatively with changes in vision and anterior chamber inflammation. New iris transillumination defects present at the edge of the optic and haptic of the 1-piece lens helped confirm the diagnosis of UGH. Upon further investigation with gonioscopy, ultrasound biomicroscopy and anterior segment optical coherence tomography, it was determined that the patient had iridociliary adhesions. These adhesions eliminated the sulcus space which resulted in iris chafing. The patient opted for conservative medical management. Best corrected distance visual acuity remained stable at 20/100 and IOP remained well-controlled. Conclusion: A complex ocular history of multiple retinal surgeries and retained viscoelastic in the anterior chamber resulted in adhesions of the ciliary processes to the iris, leading to UGH syndrome in a patient with an otherwise unremarkable placement of a single-piece in-the-bag IOL.