REFUGE2 — Retinal Fundus Glaucoma Challenge 2

2000 fundus images for glaucoma classification, optic disc/cup segmentation, and fovea localisation. Extends REFUGE1.

At a glance

Field	Value
Short name	refuge2
Full name	REFUGE2 — Retinal Fundus Glaucoma Challenge 2
First published	Unknown
Publication date precision	Unknown
Publication date evidence	Unknown
Publication date source field	Unknown
Publication date reviewed	Unknown
Primary category	fundus
Resource role	current_dataset
Dataset family	refuge2
Contained modalities	fundus
Tasks	classification, segmentation
Primary reported quantity	2,000 images
Classes	2 (non-glaucoma, glaucoma)
Splits	train, val, test
Size	1.2 GB
Source-stated terms	Research use (Grand Challenge)
Normalized terms	research-only
Descriptive screening label	Research or challenge restriction recorded; check source
Terms scope	challenge_participation
Access friction	anonymous_direct
Route backend	Google Drive
Availability	available (checked 2026-07-21)
Acquisition support	loader_implemented_not_live_tested
Legacy sample-loader status	Standard loader included

Reported quantities

Role	Count	Unit	Scope	Basis	Evidence
Primary	2,000	images	Primary quantity reported in the reviewed catalog source	legacy_catalog_field	drive.google.com/file

Counts retain their source-reported units. Additional rows can describe components, paired items, or derivative copies and are not automatically added to the primary quantity.

Notes

Current release containing all 1,200 REFUGE 2018 images plus 800 additional images. REFUGE 2018 is retained as version history below and is not counted separately.

Documented relationships

These links record source-supported lineage or overlap, not merely similar modality tags.

• fundus_domain_generalization is derived from this record: The official description states that the benchmark is based on the original REFUGE images, now represented by the current REFUGE2 record, plus Drishti-GS, ORIGA, and RIGA. (evidence)
• lmod_plus is derived from this record: The LMOD+ project page lists nine component datasets, including the five cataloged targets represented by these edges. (evidence)
• mm_retinal_reason is derived from this record: The version-pinned official dataset card lists this record among the CFP or OCT sources used to construct MM-Retinal-Reason. (evidence)
• refuge1_multirater is derived from this record: The source provides seven-rater annotations for the 1,200 original REFUGE images incorporated into the current REFUGE2 release. (evidence)
• smdg is derived from this record: The official SMDG source table lists this catalog record among the 19 standardized source domains. (evidence)

Access information and download

CLI

# Read-only preflight
eyehub download refuge2 --data-dir ./data --dry-run --json

# Download, only when preflight reports supported behavior
eyehub download refuge2 --data-dir ./data

Python

from eyedatahub.acquisition import preflight_dataset
from eyedatahub.datasets.registry import REGISTRY

ds = REGISTRY.get_dataset('refuge2')
print(preflight_dataset(ds, './data'))  # no download

Upstream page: drive.google.com/file

Other documented locations

These links identify alternate deposits, components, metadata records, mirrors, versions, or related derived materials. They do not create additional canonical catalog records.

• grand_challenge: previous version (REFUGE-2018, version 2018): Earlier 1,200-image release incorporated into REFUGE2; not counted as a separate current catalog record.
• kaggle: mirror (victorlemosml/refuge2): Non-authoritative mirror of the current REFUGE2 release.

Source-term evidence: drive.google.com/file

Loader example

This entry includes a standard DatasetSample loader.

from pathlib import Path
from eyedatahub.datasets.registry import REGISTRY

data_dir = Path('~/.eyedatahub/data').expanduser()
ds = REGISTRY.get_dataset('refuge2')
samples = ds.load(data_dir, split='test')
for s in samples[:5]:
    print(s.sample_id, s.label, s.image_path)

Citation

BibTeX

@misc{refuge2,
  title  = { REFUGE2 — Retinal Fundus Glaucoma Challenge 2 },
  note   = { Fang H. et al., 'REFUGE2 Challenge: Treasure for Multi-Domain Learning in Glaucoma Assessment', MIA 2022 },
  year   = { 2022 },
  url    = { https://drive.google.com/file/d/1DspRzDqypeBOxZnWPQxmXprNVmJwkBRJ/view },
}

Plain text

Fang H. et al., 'REFUGE2 Challenge: Treasure for Multi-Domain Learning in Glaucoma Assessment', MIA 2022.

Source-stated terms

• Raw source string: Research use (Grand Challenge)
• Normalized category: research-only
• Apparent scope: challenge_participation
• Descriptive screening label: Research or challenge restriction recorded; check source

⚠️ Source-stated terms, scope, and normalized labels are curation metadata, not legal advice or a permission finding. Review the current official source before transfer or reuse.

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