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Abstract : The nonarteritic form of AION I Nonarteritic ischemic optic neuropathy (NAION) is the most common acute form of ischemic optic neuropathy. This is a cross-sectional study that was conducted on NAION 100 patients. Demographic data, history of smoking, hypertension, diabetes, drugs, IHDs and hyperlipidemia were documented. Patients were interviewed & examined by specialist ophthalmologist. Chi-square test was used for association between NAION and risk factors. Mean age of participants was 58.59 ±11.03 years. Males constituted to 63% of cases. 49 patients were smokers (48 males and one female). 4 patients have drug history, 80 patients were hypertensive (46 males and 34 females) while 59 patients were diabetic (36 males and 23 females), 17 patients have hyperlipemia (11 males and 6 are females) and 8 patients were suffering from IHDs (5 males and 3 females). In terms of visual acuity, 34 patients suffered severe loss of visual acuity, moderate loss in 25 cases and mild loss in 16 cases. Visual acuity has shown to be worse in presence of risk factors (smoking, hypertension, diabetes and hyperlipidemia). Chi-square test didn’t show a significant difference. NAION is more common in males than females, and its incidence tends to rise with age, which may be related to the more common occurrence of comorbidities that pose a greater risk for vascular events in men. A change toward healthy aging or a failure to recognize NAION symptoms or medical needs may account for the reductions reported in the very old. Current study findings are in congruence with other international studies highlighting higher prevalence of NAION among hypertensive, diabetic, hyperlipidemic patients. High prevalence of severe visual acuity loss reflects problem of late diagnosis and negligence as this problem occurs mainly in geriatric age group.