Table 1.
Characteristics of datasets.
| Item | NEH dataset | ZEH dataset | JEH dataset | NOC dataset | Smartphone dataset | ||
|---|---|---|---|---|---|---|---|
| Total no. of images | 7120 | 1182 | 2357 | 3386 | 1303 | ||
| Total no. of qualified imagesa | 6567 | 929 | 1987 | 2928 | 1146 | ||
| No. of subjects | 3568 | 656 | 1232 | 1849 | 683 | ||
| Age, mean/range (years) | 41.6/4–98 | 39.2/10–83 | 42.3/8–96 | 45.7/5–89 | 44.3/5–90 | ||
| No. (%) of women | 1689 (47.3) | 302 (54.3) | 533 (51.6) | 799 (48.5) | 344 (50.4) | ||
| Level of institution | Tertiary eye care center | Tertiary eye care center | Secondary eye care center | Secondary eye care center | Tertiary eye care center | ||
| Location of institution | Urban | Urban | Urban | Urban | Urban | ||
| Average yearly temperature (°C) | 18.3 | 18.8 | 16.2 | 18.0 | 19.3 | ||
| Camera model | Canton Optics LS-7 (China) | Sanyo VPC-MZ3GX (Japan) | Kanghua SLM-3 (China) | Nikon DSC D5200 (Japan) | Huawei P30 (China) | ||
| Training set | Validation set | Test set | |||||
| Keratitisb | 2185/4526 (48.3) | 511/1055 (48.4) | 483/986 (49.0) | 378/929 (40.7) | 1186/1987 (59.7) | 843/2928 (28.8) | 469/1146 (40.9) |
| Cornea with other abnormalitiesb | 585/4526 (12.9) | 136/1055 (12.9) | 130/986 (13.2) | 237/929 (25.5) | 236/1987 (11.9) | 969/2928 (33.1) | 484/1146 (42.2) |
| Normal corneab | 1756/4526 (38.8) | 408/1055 (38.7) | 373/986 (37.8) | 314/929 (33.8) | 565/1987 (28.4) | 1116/2928 (38.1) | 193/1146 (16.9) |
NEH Ningbo Eye Hospital, ZEH Zhejiang Eye Hospital, JEH Jiangdong Eye Hospital, NOC Ningbo Ophthalmic Center.
aQualified images indicate the images with sufficient diagnostic certainty and good quality.
bData are no. of images/total no. (%) unless otherwise indicated.