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Persistent elevation of intraocular pressure following intravitreal injection of bevacizumab.

BACKGROUND
The number of patients treated with intravitreal injections has increased significantly over the past few years, mainly following the introduction of anti-vascular endothelial growth factor antibody intraocular drugs. Bevacizumab is mostly used in this group of medications.


OBJECTIVES
To describe persistent elevation of intraocular pressure (IOP) following intravitreal injection of bevacizumab.


METHODS
We reviewed consecutive cases of persistent IOP elevation after intravitreal bevacizumab injection for exudative age-related macular degeneration (AMD). A total of 424 patients (528 eyes) met the inclusion criteria and received 1796 intravitreal injections of bevacizumab. Persistent IOP elevation was found in 19 eyes (3.6%, 19/528) of 18 patients (4.2%, 18/424) with IOP elevated 30-70 mmHg 3-30 days after injection.


RESULTS
Mean IOP was 42.6 mmHg (range 30-70); IOP elevations occurred after an average of 7.8 injections of bevacizumab (range 3-13). Injected eyes (19/528) had a significantly higher incidence of elevated IOP than uninjected eyes (fellow eyes), 1/328, P < 0.001.


CONCLUSIONS
Like other anti-vascular endothelial growth factor (VEGF) substances reported in a few recent studies, intravitreal injection of bevacizumab for neovascular AMD may be associated with persistent IOP elevation. Providers should be aware that significant IOP elevation might occur after repeated treatments.