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Reasons for ungradable fundus photographs (n=74)
| Reason | Number of cases (percentage of total) |
|---|---|
| Media opacification | |
| Cataract | 22 (4) |
| Corneal opacity | 10 (2) |
| Intraocular lens posterior capsular opacity | 7 (1) |
| Nonopacification* | 35 (6) |
| Total | 74 (12) |
*Including: Dilation difficulty, poor quality photograph, uncooperative patient
