A substantial proportion of patients who require intravitreal corticosteroid injections or implants have comorbid glaucoma or an increased risk of glaucoma. Before proceeding, ensure glaucoma is controlled and anticipate a possible steroid response in advance. Approximately one-third of patients receiving a dexamethasone intravitreal implant will require IOP-lowering (antihypertensive) therapy, and more than half of patients with pre-existing glaucoma will need an escalation of IOP-lowering treatment. Therefore, consider consulting a glaucoma specialist before injection/implantation, especially if the IOP is not at target or the patient has shown steroid response earlier. (1,2,3) It has been shown that also type 1 diabetes, myopia, long axial length and age can increase the risk of a relevant steroid response. (4)
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Contributor: Dr. med. Fabian Gielen, Head of Glaucoma, Kantonsspital Winterthur, Switzerland
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