Demograpics and clinical characteristics for immediate sequential bilateral cataract surgery (ISBCS) and one eye at time cataract surgeries in Tampere University Hospital Eye Centre, 2008–2020
| All cataract surgeries | ISBCS | One eye at a time cataract surgeries | |
| Eyes, n (%) | 56 700 (100%) | 26 890 (47%) | 29 810 (53%) |
| Patients | 34 797 (100%) | 13 445 (39%) | 21 352 (61%) |
| Age (years), median (IQR) | 75 (68–80) | 76 (70–81) | 74 (67–80) |
| 0–17 years | 63 (0.2%) | 8 (0.1%) | 55 (0.3%) |
| 18–44 years | 427 (1.2%) | 84 (0.6%) | 343 (1.6%) |
| 45–64 years | 5156 (15%) | 1526 (11%) | 3630 (17%) |
| 65–84 years | 25 400 (73%) | 10 324 (77%) | 15 076 (71%) |
| >=85 years | 3 751 (11%) | 1 503 (11%) | 2 248 (11%) |
| Female sex, n (%) | 2 1026 (60%) | 8 423 (63%) | 12 603 (59%) |