Overall prevalence of VRIA on image grading of colour fundus photographs and OCT images
| Monocular visual impairment eyes (n=1684) | Binocular visual impairment eyes (n=812) | No visual impairment eyes (n=472) | ||
| Colour fundus images | Gradeable images | 1 362 | 645 | 385 |
| ERM | 64 (4.7%*) | 24 (3.72%*) | 7 (1.82%*) | |
| FTMH | 2 (0.15%*) | 0 | 0 | |
| Spectral domain OCT images | Gradeable images | 1 615 | 775 | 464 |
| VMT at fovea | 14 (0.87%*) | 12 (1.55%*) | 3 (0.65%*) | |
| VMT elsewhere | 10 (0.62%*) | 8 (1.03%*) | 3 (0.65%*) | |
| ERM at fovea | 50 (3.1%*) | 22 (2.84%*) | 5 (1.08%*) | |
| ERM elsewhere | 274 (16.96%*) | 125 (16.13%*) | 31 (6.68%*) | |
| FTMH | 3 (0.19%*) | 2 (0.26%) | 0 | |
| PTMH | 12 (0.74%*) | 3 (0.39%*) | 5 (1.08%*) | |
| Foveoschisis | 5 (0.31%) | 3 (0.39%*) | 0 |
*Of gradeable images.
ERM, epiretinal membrane; FTMH, full-thickness macular hole; OCT, optical coherence tomography; VMT, vitreomacular traction; VRIA, vitreoretinal interface abnormalities.