| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Acute non-arteritic central retinal artery occlusion (CRAO) |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| central artery occulasion |  | 
| 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 |  | 
| 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) |  | 
| 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. |  | 
| 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
 
 |  | 
| 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
 
 |  | 
| 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
 
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| 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
 
 |  | 
| 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
 
 |  | 
| 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 |  | 
| 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 |