I had an eye stroke, AION [anterior ischemic optic neuropathy], caused by GCA nov 2017. It caused loss of upper half of vision in left eye. My sister had CRAO [central retinal arteric occlusion] in one eye in 2010 losing most of vision in that eye. She recently had BRVO [branch retinal vein occlusion] in the good eye with some temporary vision loss now back to normal. Link:
verywellhealth.com/what-is-...
"Sudden vision loss without pain is the most common symptom of a stroke involving your eye. An eye stroke, or anterior ischemic optic neuropathy (AION), is a condition in which blood flow either becomes blocked or reduced to the tissues of the front part of the optic nerve............................
Depending on the area of the eye where blood flow becomes blocked or reduced, the following occlusions may occur.
Central retinal artery occlusion (CRAO): This occlusion usually occurs with sudden, profound vision loss in one eye, with no pain. It occurs in the retina.
Central retinal vein occlusion (CRVO): Usually causing sudden, painless vision loss that can be mild or severe, this blockage occurs in the central retinal vein where it enters the eye.
Branch retinal artery occlusion (BRAO): This blockage is usually painless and occurs suddenly. The patient usually loses peripheral vision, and sometimes central vision as well. Underlying causes include narrowing of the carotid artery, high blood pressure, cholesterol disorders, and/or cardiac disease.
Branch retinal vein occlusion (BRVO): This type of blockage causes bleeding and clotting along the retinal vein It may result in decreased vision, peripheral vision loss, distorted vision, or blind spots. This type involves one eye and may be caused by high blood pressure or diabetes.
A dangerous form of AION known as arteritic AION is caused by a condition known as giant cell arteritis (GCA)." Another link:
ncbi.nlm.nih.gov/pmc/articl...
Visual Manifestations in Giant Cell Arteritis: Trend over Five Decades in a Population-based Cohort
Abha G. Singh, MBBS,1 Tanaz A. Kermani, MD MS,2 Cynthia S. Crowson, MS,1 Cornelia M. Weyand, MD, PhD,3 Eric L. Matteson, MD MPH,1 and Kenneth J. Warrington, MD1
"Among the 47 patients with visual manifestations, the most common visual symptoms were blurred vision (31 patients, 66%) and diplopia (11 patients, 23%) (Table 2). Other visual manifestations included amaurosis fugax (7 patients, 15%) and partial visual field loss (9 patients, 19%). Nine patients (19%) had complete loss of vision, which was unilateral in 7 patients and bilateral in 2 patients. Ischemic optic neuropathy (ION) was the predominant ophthalmologic diagnosis (17 patients, 36%). Other diagnoses included central retinal artery occlusion (2 patients, 4%) and non-specific ophthalmologic findings such as venous congestion and retinal hemorrhages (Table 3)."