<prompt> A 75year old patient presents with deterioration of vision. On examination the pupillary reflex is observed to be sluggish and the Intraocular pressure is normal. Optic disc evaluation shows a large and deep cup and primarily shows paracentral scotomas. The most likely diagnosis isPrimary Narrow Angle glaucomaNormal Tension GlaucomaNeovascular GlaucomaAbsolute Glaucoma  <response>: Glaucomatous cupping large and deep cup along with glaucomatous visual field defect paracentral scotomas are the most frequent in a patient with normal intraocular pressure suggest a diagnosis of Normal Tension Glaucoma NTG. 