Dataset features distribution (% rounded at first decimal)
| High pigm. | Slight pigm. | Synechia | Angle closure | |
| Light iris | 43 (15.7%) | 45 (16.4%) | 7 (2.6%) | 1 (0.4%) |
| Dark iris | 60 (21.9%) | 51 (18.6%) | 43 (15.7%) | 24 (8.8%) |
Each image has been categorised by two main visual traits: the iris colour (rows) and an additional predominant feature of the sector (columns).