| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Acute non-arteritic central retinal artery occlusion (CRAO) | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
| central artery occulasion | 
 
 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Eye Diseases [C11] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 20.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10007971 | 
 
| E.1.2 | Term  | Central retinal artery occlusion | 
 
| E.1.2 | System Organ Class  | 10015919 - Eye disorders | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| Functional recovery to best corrected visual acuity (BCVA) of Logarithm of the Minimum Angle of Resolution (LogMAR) ≤ 0.5 (normal to mild vision impairment according to WHO ICD-11 (WHO, 2019)) in the affected eye at Visit (V) 3 (30 ± 5 days), dichotomized ITT analysis (functional recovery to LogMAR ≤ 0.5 vs. no functional recovery, i.e., LogMAR > 0.5)  | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
| To investigate efficacy of IVT using alternative endpoints as well as to investigate safety of IVT in non-arteritic CRAO. | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
●	Age ≥ 18 years ●	Acute non-arteritic CRAO (i.e. sudden, painless monocular vision loss) ≤ 12 hours after symptom onset confirmed by an experienced ophthalmologist through assessment of: BCVA, intraocular pressure, swinging flash light test (relative afferent pupil defect), slit-lamp biomicroscopy, fundoscopy, and OCT of the macula of both eyes* (*within the 4.5-hour time window: to be skipped if not feasible ≤ 10 minutes; beyond the 4.5-hour time window: mandatory) ●	BCVA of LogMAR ≥ 1.3 in the affected eye (functional blindness according to WHO ICD-11) ●	Reading must have been possible with the affected eye before CRAO (LogMAR ≤ 0.5) ●	Neurological examination performed by an experienced stroke neurologist ●	Brain imaging as per local standard for acute retinal ischemia/stroke assessment, either cranial computed tomography (CT) or cranial magnetic resonance imaging (MRI) Additional inclusion criteria for interventional study: ●	Initiation of study treatment (IVT or placebo) by an experienced stroke neurologist within ≤ 4.5 hours of certain symptom onset ●	Written informed consent (interventional study) given by the patient Additional inclusion criteria for observational study: ●	Participation of patients within ≤ 4.5 hours of symptom onset is only allowed in case of contraindication(s) for IVT of contraindication(s) for IVT or history of hypersensitivity to Acitlyse® or in case of pregnancy or laction ●	Written informed consent (observational study) given by the patient 
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| E.4 | Principal exclusion criteria | 
●	Suspected giant cell arteritis ●	Other-than-CRAO cause of acute visual loss (e.g., retinal detachment, vitreous hemorrhage, acute glaucoma, acute optic neuritis) ●	Rapidly improving vision in the affected eye ●	Acute ischemic stroke with indication for on-label intravenous thrombolysis (IVT) ●	Any co-existing or terminal disease with anticipated life expectancy of < 3 months ●	Prior participation in the REVISION trial Additional exclusion criteria for interventional study: ●	Pregnancy or lactation ●	History of hypersensitivity to Actilyse® ●	Contraindications for IVT:       o	intracranial hemorrhage or subacute infarct on brain imaging 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
Primary efficacy endpoint of the interventional study: Functional recovery to best corrected visual acuity (BCVA) of Logarithm of the Minimum Angle of Resolution (LogMAR) ≤ 0.5 (normal to mild vision impairment according to WHO ICD-11) in the affected eye at Visit (V) 3 (30 ± 5 days), intention-to-treat (ITT) analysis 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
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| E.5.2 | Secondary end point(s) | 
Secondary endpoints of the interventional study: ITT and per protocol (PP) analyses of all endpoints Secondary efficacy endpoints of the interventional study: ●	Functional recovery to LogMAR ≤ 0.5 at V3, PP analysis ●	Functional recovery to LogMAR ≤ 0.5 at V2 (18 – 72 hours), and V4 (90 ± 10 days) ●	Shift in visual outcome categories (according to WHO ICD-11: normal vision (LogMAR ≤ 0), mild vision impairment (LogMAR > 0 and ≤ 0.5), moderate vision impairment (LogMAR > 0.5 and ≤ 1.0), severe vision impairment (LogMAR > 1.0 and ≤ 1.3), counting fingers (LogMAR > 1.3 and ≤ counting fingers), hand motion or light perception, and no light perception) at V2 , V3, and V4 ●	Dichotomized analysis visual outcome: ‘normal vision to moderate visual impairment’ vs. ‘severe visual impairment or functional blindness’ and ‘normal vision to severe visual impairment’ vs. ‘functional blindness’ at V2, V3, and V4 ●	Kinetic visual field using III4e mark at V3 and V4 ●	Central retinal artery recanalization assessed using optical coherence tomography angiography (OCT/A) of the optic nerve head and the macula at V2, V3, and V4 ●	Retinal arterial perfusion assessed using fluorescein angiography at V3 and V4 ●	National Eye Institute Visual Function Questionnaire-25 (NEI-VFQ-25) at V3 and V4 ●	National Institutes of Health Stroke Scale score (NIHSS) at V2 ●	modified Rankin Scale score (mRS) at V3, and V4 (dichotomized into categories 0 – 1 vs. 2 – 6, 0 – 2 vs. 3 – 6, and shift analysis) ●	Fraction of patients with and number of acute ischemic lesions on follow-up diffusion-weighted (DWI) cranial magnetic resonance imaging (MRI) at V2 Secondary safety endpoints of the interventional study: ●	All-cause and stroke-related death at V3 and V4 ●	mRS at V3 and V4 (dichotomized into categories 0 – 3 vs. 4 – 6, and 0 – 4 vs. 5 – 6) ●	any intracranial hemorrhage (ICH) on follow-up MRI at V2 ●	symptomatic ICH (as per ECASS III and Heidelberg bleeding classification) within 5 days after randomization ●	intraocular hemorrhage in the affected eye at V2 ●	major bleeding (decrease of ≥ 2 g hemoglobin per dL, requiring transfusion, at critical site or resulting in death) within 5 days after randomization ●	retinal neovascularization requiring therapy at V3 and V4 ●	Adverse events (AE) until V2, AE of special interest (AESI) and serious AE (SAE) until V3 and V4 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
●	Functional recovery to LogMAR ≤ 0.5 at V3 (30 ± 5 days) (dichotomized) ●	Functional recovery to LogMAR ≤ 0.5 at V2 (18 – 72 hours), and V4 (90 ± 10 days) (dichotomized) ●	Shift in visual outcome categories (according to WHO ICD-11 (WHO, 2019): normal vision (LogMAR ≤ 0), mild visual impairment (LogMAR > 0 and ≤ 0.5), moderate visual impairment (LogMAR > 0.5 and ≤ 1.0), severe visual impairment (LogMAR > 1.0 and ≤ 1.3), counting fingers (LogMAR > 1.3 and ≤ counting fingers), hand motion or light perception, and no light perception) at V2, V3, and V4 ●	Dichotomized analysis of visual outcome: ‘normal vision to moderate visual impairment’ vs. ‘severe visual impairment or functional blindness’ and ‘normal vision to severe visual impairment’ vs. ‘functional blindness’ at V2, V3, and V4 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  Yes  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  No  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 18 | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  Yes  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years |  | 
| E.8.9.1 | In the Member State concerned months | 50 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial months | 50 |