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Aqueous misdirection and ciliary block (malignant) glaucoma after cataract removal in a llama
Cynthia C Powell1, Tanja M Nuhsbaum, Juliet R Gionfriddo
1Colorado State University, College of Veterinary Medicine and Biomedical Sciences, Department of Clinical Sciences, Fort Collins, 80523, USA. ceep@lamar.colostate.edu
Abstract:
Ciliary block (malignant) glaucoma is caused by the posterior flow of aqueous humor into or behind the vitreous. It is a rare complication of anterior segment surgery in humans. This is a report of ciliary block glaucoma occurring as a postoperative complication of cataract surgery in a llama. Medical management was ineffective in lowering intraocular pressure (IOP). Posterior capsulotomy and anterior hyaloid disruption with a 22-gauge needle, in addition to medical management maintained IOP in the normal range until anterior vitrectomy could be performed. After vitrectomy, glaucoma resolved and medical treatment was no longer necessary.