A Patient with Primary Open-Angle Glaucoma with Re-Elevated Nocturnal Sitting Intraocular Pressure after Restarting Medical Therapy due to a Bleb Failure

We describe the case of a primary open-angle glaucoma patient with re-elevated nocturnal sitting intraocular pressure (IOP) after restarting medical therapy due to a failing bleb. IOP was markedly higher than diurnal IOP during multiple-drug therapy in both eyes, but it did not increase in the left eye with a functional bleb without medical therapy after trabeculectomy with adjuvant mitomycin. However, nocturnal sitting IOP was re-elevated after restarting multiple-drug therapy due to a failing bleb, while diurnal IOP was maintained at a low level.