Subfield · Ophthalmology
Top Countries in Ophthalmology Research
United States ranks first in 2022–2025, out of 44 ranked countries.
Composite score: field-normalised excellence, output and total citations weighted 50 / 30 / 20, each as a percentile so no single heavy-tailed measure dominates. Floor: 100 fractional works in this field.
Ranked by research quality, 2022–2025
| # | Country | Score | Top-10% rate | Works | Citations | All time |
|---|---|---|---|---|---|---|
| 1 | United States | 100.0 | 16.0% | 11k | 57k | #1 |
| 2 | China | 81.7 | 19.6% | 8.1k | 50k | #3 |
| 3 | United Kingdom | 71.0 | 17.5% | 2.4k | 14k | #2 |
| 4 | India | 63.4 | 7.0% | 6.1k | 15k | #9 |
| 5 | Australia | 57.5 | 23.3% | 972 | 7.7k | #6 |
| 6 | Italy | 52.7 | 21.2% | 1.5k | 9.5k | #7 |
| 7 | Germany | 48.6 | 14.5% | 1.9k | 8.9k | #4 |
| 8 | Japan | 45.0 | 13.3% | 2.1k | 9.3k | #5 |
| 9 | France | 41.9 | 13.5% | 1.2k | 5.5k | #8 |
| 10 | Spain | 39.2 | 10.2% | 1.5k | 6k | #11 |
| 11 | Singapore | 36.6 | 26.7% | 403 | 3.8k | #12 |
| 12 | South Korea | 34.3 | 11.8% | 1.6k | 6.6k | #15 |
| 13 | Canada | 32.2 | 14.8% | 937 | 4.9k | #10 |
| 14 | Switzerland | 30.3 | 17.8% | 497 | 2.9k | #14 |
| 15 | Türkiye | 28.4 | 6.0% | 1.9k | 4.9k | #18 |
| 16 | Taiwan | 26.7 | 15.8% | 651 | 3.4k | #23 |
| 17 | Poland | 25.1 | 13.7% | 586 | 2.7k | #26 |
| 18 | Iran | 23.6 | 9.8% | 1.1k | 3.5k | #20 |
| 19 | Saudi Arabia | 22.2 | 10.8% | 644 | 2.5k | #27 |
| 20 | Netherlands | 20.8 | 23.9% | 344 | 2.5k | #13 |
| 21 | Egypt | 19.5 | 5.2% | 1k | 2.3k | #29 |
| 22 | Denmark | 18.3 | 22.5% | 251 | 1.8k | #22 |
| 23 | Brazil | 17.1 | 7.2% | 1k | 2.5k | #19 |
| 24 | ?? | 16.0 | 15.8% | 346 | 1.9k | #28 |
| 25 | Romania | 14.9 | 22.7% | 200 | 1.2k | #41 |
| 26 | Sweden | 13.9 | 16.3% | 266 | 1.3k | #16 |
| 27 | Portugal | 12.9 | 12.4% | 382 | 1.5k | #31 |
| 28 | Austria | 11.9 | 23.0% | 264 | 1.5k | #17 |
| 29 | Pakistan | 11.0 | 4.0% | 688 | 1.2k | #39 |
| 30 | Russia | 10.1 | 1.6% | 1.2k | 1.5k | #33 |
| 31 | Israel | 9.3 | 10.9% | 406 | 1.6k | #21 |
| 32 | Greece | 8.4 | 11.8% | 271 | 1.1k | #32 |
| 33 | Thailand | 7.6 | 12.9% | 257 | 1.2k | #40 |
| 34 | Belgium | 6.8 | 13.6% | 213 | 955 | #30 |
| 35 | Mexico | 6.0 | 6.7% | 330 | 928 | #25 |
| 36 | Malaysia | 5.3 | 4.9% | 353 | 949 | #42 |
| 37 | Indonesia | 4.6 | 2.3% | 654 | 540 | #47 |
| 38 | Morocco | 3.9 | 3.7% | 285 | 364 | #50 |
| 39 | Nigeria | 3.2 | 2.9% | 323 | 469 | #46 |
| 40 | Colombia | 2.5 | 7.2% | 208 | 393 | #48 |
| 41 | Iraq | 1.9 | 4.1% | 222 | 392 | #53 |
| 42 | Ukraine | 122.9 | 4.2% | 253 | 303 | #54 |
| 43 | Nepal | 60.8 | 2.9% | 206 | 278 | #55 |
| 44 | Tunisia | 0.0 | 2.6% | 216 | 270 | #51 |
countries ranked worldwide in Ophthalmology (44). rank on the composite score within the stated pool. The score track runs 0 to 100; the rate track carries no world mark, because the world rate differs by field.
How spread out this pool is
Every row above on one axis — one tick each, right is a higher score. A field where the top few are far clear of everyone and one that runs down evenly look identical as a table.
One bar per band of score, counting the rows on this page.
Ranked by volume, 2022–2025
- 1 United States 11k works
- 2 China 8.1k works
- 3 India 6.1k works
- 4 United Kingdom 2.4k works
- 5 Japan 2.1k works
- 6 Germany 1.9k works
- 7 Türkiye 1.9k works
- 8 South Korea 1.6k works
- 9 Spain 1.5k works
- 10 Italy 1.5k works
- 11 Russia 1.2k works
- 12 France 1.2k works