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Previous ophthalmological evaluations of the students.
| Previous ophthalmological exam | |||
| f | % | ||
| Previous ophthalmological exam | n = 767 | ||
| Yes | 306 | 39.9 | |
| No | 461 | 60.1 | |
| Service | n = 306 | ||
| Public Service | 147 | 48.0 | |
| Covenant System | 81 | 26.5 | |
| Private System | 74 | 24.2 | |
| Do not remember | 4 | 1.3 | |
