How Is Retinal Artery Occlusion Diagnosed? Tests, Criteria & Process
Retinal Artery Occlusion diagnosis relies on Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis. Learn the full diagnostic pathway, clinical criteria, differential workup, and what to expect at your evaluation.
Updated March 27, 2026
Retinal Artery Occlusion is diagnosed using Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis and targeted clinical evaluation. Retinal artery occlusion is a sudden blockage of the central or branch retinal artery, causing painless acute vision loss — essentially a stroke of the eye. It shares risk factors with ischaemic stroke: hypertension, atrial fibrillation, and carotid artery disease.
Clinical Context
The diagnostic process for Retinal Artery Occlusion begins with Thorough history and physical examination followed by basic blood and urine tests; targeted specialist investigation as needed. Key investigations include Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis, Chest X-ray. The gold standard is: Directed investigation based on clinical history and physical examination findings. Clinical guidelines from NICE / BMJ Best Practice / WHO define the diagnostic criteria and recommended investigation pathway.
Clinical Pathway
Retinal Artery Occlusion — Full Condition GuideCondition HubRetinal Artery Occlusion — Differential DiagnosisDifferentialRetinal Artery Occlusion — Treatment PathwaysTreatmentRetinal Artery Occlusion — Prognosis & OutlookPrognosisFrequently Asked Questions
How Is Retinal Artery Occlusion Diagnosed? Tests, Criteria & Process?+
Retinal Artery Occlusion is diagnosed using Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis and targeted clinical evaluation. Retinal artery occlusion is a sudden blockage of the central or branch retinal artery, causing painless acute vision loss — essentially a stroke of the eye. It shares risk factors with ischaemic stroke: hypertension, atrial fibrillation, and carotid artery disease.
How do doctors test for retinal artery occlusion?+
The main tests used to diagnose Retinal Artery Occlusion include Full blood count (FBC), Comprehensive metabolic panel (electrolytes, creatinine, LFTs), Urinalysis. Your doctor will select investigations based on your symptoms, clinical findings, and risk factors.
How long does it take to diagnose Retinal Artery Occlusion?+
The time to diagnosis varies. Some cases are identified within hours using clinical presentation and blood tests; others require weeks, repeated investigations, or specialist referral.
Can Retinal Artery Occlusion be missed on initial testing?+
Yes — Retinal Artery Occlusion can be missed if initial tests are negative or if the presentation is atypical. If clinical suspicion remains high, repeat testing or specialist referral is appropriate.
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