| http://www.w3.org/ns/prov#value | - Permanent vision loss from ocular ischemia may occur within hours as the intraocular pressure approaches the central retinal artery systolic blood pressure.3,10,14???16 Acute angle-closure glaucoma may present with constitutional symptoms, such as headache, nausea, vomiting, or malaise, that can obscure the diagnosis.10,11,17???19
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