The mean patient age was 62 years in one series (range 18 to 90 years).The mean age varies by etiology category; patients with giant cell arteritis (GCA) are older (mean 78 years, range 50 to 82 years), while those with PION in the setting of spine surgery are younger on average.There is a higher than expected prevalence of atherosclerotic risk factors and comorbid vascular disease, especially in patients with nonarteritic (idiopathic) PION, with 87 percent of patients having at least one risk factor for, or one other manifestation of, atherosclerotic vascular disease. While anterior ischemic optic neuropathy (AION) appears to be more common than PION after cardiac surgery, PION is relatively more common in cases of spine surgery. References
Further reading
Luneau K, Newman NJ, Biousse V (November 2008). "Ischemic optic neuropathies". The Neurologist. 14 (6): 341–54. doi:10.1097/NRL.0b013e318177394b. PMID 19008740. S2CID 8445417. Remigio D, Wertenbaker C (2000). "Post-operative bilateral vision loss". Survey of Ophthalmology. 44 (5): 426–32. doi:10.1016/S0039-6257(00)00107-7. PMID 10734242. Buono LM, Foroozan R, Savino PJ, Danesh-Meyer HV, Stanescu D (June 2003). "Posterior ischemic optic neuropathy after hemodialysis". Ophthalmology. 110 (6): 1216–8. doi:10.1016/S0161-6420(03)00257-4. PMID 12799249. == External links ==
Alora may refer to:

Alora (gastropod), a genus of wentletraps in the family Epitoniidae
Alora (drug), a brand name for transdermal Estradiol
Álora, a town in southern Spain