[The prepapillary venous loop in glaucoma]

58-year-old patient presents open angle glaucoma at both eyes, with bigger intraocular pressure at right eye. This eye presents two epipapillary venous curls, the nasal one being sharper and aplatized. Asymmetrical evolution with bigger intraocular pressure and papillar excavation at this eye presenting venous curls is determined by local modifications in blood elimination. It is discussed the importance of epipapillary venous curls, with retino-ciliary venous decrease in worsening of existent glaucoma.