Table 4. Countries of Authors Publishing in the Ophthalmic Literature, Ranked by Country h-Index for Ophthalmic Journal Articles .
| Rank | Country | h-Index for ophthalmic journal articles | No. of articles |
|---|---|---|---|
| 1 | United States | 444 | 180 017 |
| 2 | United Kingdom | 256 | 41 085 |
| 3 | Italy | 254 | 12 129 |
| 4 | Germany | 224 | 20 384 |
| 5 | Australia | 207 | 17 458 |
| 6 | Japan | 196 | 24 104 |
| 7 | Canada | 174 | 15 173 |
| 8 | Netherlands | 163 | 8479 |
| 9 | Switzerland | 158 | 5875 |
| 10 | France | 157 | 7325 |
| 11 | Singapore | 146 | 4248 |
| 12 | Spain | 137 | 8211 |
| 13 | China | 136 | 16 962 |
| 14 | India | 129 | 19 985 |
| 15 | Sweden | 123 | 5063 |
| 16 | Brazil | 118 | 4263 |
| 17 | South Korea | 115 | 8343 |
| 18 | Austria | 115 | 2990 |
| 19 | Israel | 107 | 5914 |
| 20 | Hong Kong | 105 | 2963 |