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  • Title: Sustained elevation of intraocular pressure after intravitreal injections of anti-VEGF agents.
    Author: Good TJ, Kimura AE, Mandava N, Kahook MY.
    Journal: Br J Ophthalmol; 2011 Aug; 95(8):1111-4. PubMed ID: 20702430.
    Abstract:
    AIMS: To report the rate of intraocular pressure (IOP) elevation associated with repeated intravitreal injections of antivascular endothelial growth factor (VEGF) agents and to determine if a pre-existing diagnosis of glaucoma is a risk factor for this phenomenon. METHODS: The charts of 215 eyes undergoing intravitreal injection with anti-VEGF agents for wet age-related macular degeneration (AMD) were retrospectively examined with respect to frequency of injections, number of injections and changes in IOP. Data were analysed independently for two groups (1) pre-existing glaucoma and (2) no history of glaucoma. RESULTS: Of the 215 eyes receiving injections with bevacizumab and/or ranibizumab, 6% (n=13) had sustained IOP elevation requiring medical or laser interventions. Of the eyes receiving only bevacizumab, 9.9% (10/101) had sustained elevated IOP, while 3.1% (3/96) of eyes receiving only ranibizumab experienced increases (p=0.049). Patients with pre-existing glaucoma experienced higher rates of elevated IOP when compared with patients without pre-existing glaucoma (33% vs 3.1% respectively; p<0.001). The glaucoma subgroup had a lower median number of injections (6; interquartile range 5-10) compared with the non-glaucoma group (9.5; interquartile range 6-13.7; p=0.031). CONCLUSIONS: The incidence of sustained elevated IOP in patients receiving intravitreal anti-VEGF injections is significant. Additionally, these data suggest the possibility of a heightened risk for further elevation of IOP in patients with pre-existing glaucoma who receive either bevacizumab or ranibizumab. Prospective studies are needed to verify these results and better understand the implications of these findings.
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