Aims: To identify the most common cause and the frequent stage of presentation in patients with neovascular glaucoma. Methods: A prospective observational study was conducted in the Department of Ophthalmology, M.G.M. Medical College & Hospital, Jamshedpur, Jharkhand, India for 18 months. Total 150 eyes of 120 patients having neovascular glaucoma in one eye or both the eyes were included in the study. All patients underwent thorough ocular examination i.e., visual acuity, slit lamp bio-microscopy, intraocular pressure (IOP) measurement by Goldmann applanation tonometry, gonioscopy with Posner 4 mirror indirect gonioscope and dilated fundus examination. Results: On gonioscopic examination, most of the cases 74 (61.67%) presented in rubeosis iridis stage, 29 (24.16%) in angle closure stage and 17 (14.17%) in open angle stage Out of 120 eyes, 75 (62.5%) had diabetic retinopathy in variable severity, 16(13.33%) had inflammatory etiology, 13 (10.83%) had retinal vein occlusion and 13 (10.83%) had glaucoma (PXG and absolute glaucoma). Compares the mean IOP in different stages of NVG. Mean IOP in Angle closure stage is significantly higher than the mean IOP in other two stages (P = 0.0001). Whereas there is no statistically significant difference between the mean IOP in rubeosis iridis stage and open angle stage (P= 0.749). 75 eyes (62.5%) had IOP < 30 mm of Hg of which 55 were in rubeosis iridis stage. 45 eyes (37.5%) had IOP > 30 mm of Hg of which 27 were in angle closure stage. IOP < 30mm of Hg was found mostly in rubeosis iridis stage and> 30 mm of Hg was found in angle closure stage. On assessing the Cause of NVG in relation to stage of NVG (P=0.17), 75 eyes (62.5%) had diabetic retinopathy in variable severity, of these 40, 20 and 15 were in rubeosis iridis, angle closure and open angle stage respectively. Conclusion: In the present study, it was found that Proliferative diabetic retinopathy is the most common cause and rubeosis iridis is the most common stage of presentation in NVG.