| Summary: | Purpose: Aphakic pupillary block glaucoma is a rare complication after congenital cataract surgery. We describe the case of an infant with acute angle closure in an aphakic eye following congenital cataract lensectomy with anterior vitrectomy nine months prior. Potential pathophysiology and therapeutic strategies are discussed. Observations: A one-year-old male infant presented to our emergency unit with right eye injection and pain. At the age of six weeks he had undergone right eye lensectomy with anterior vitrectomy for congenital cataract and was left aphakic with large anterior and posterior capsulorrhexis. Examination was significant for a shallow anterior chamber centrally and iridocorneal touch of the periphery for 360° with intraocular pressure (IOP) measured at 70 mmHg. The child was diagnosed with aphakic pupillary block leading to an acute angle closure event. He underwent emergent anterior vitrectomy with surgical peripheral iridotomy (PI) performed via pars plana approach. This resulted in immediate deepening of the anterior chamber, with resolution of the pupillary block and iridocorneal touch. Thereafter, his ocular exam was normal. Conclusions and Importance: This unusual case underscores the importance of vigilance in the postoperative management of children after congenital cataract extraction. Unexpected complications remain a threat despite the initial undertaking of preventative measures. Keywords: Aphakic pupillary block, Pediatric aphakic glaucoma, Congenital cataract, Posterior peripheral vitrectomy
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