Table 3.
Astigmatism types according to the spherical value
| Astigmatism types | Reference range value | LE | RE | ||
|---|---|---|---|---|---|
| Number of cases | % | Number of cases | % | ||
| Low mixt astigmatism | 0 - (+3) D | 3180 | 85.90% | 3066 | 85.74% |
| Moderate mixt astigmatism | (+3) - (+6) | 137 | 3.70% | 133 | 3.72% |
| High mixt astigmatism | > (+6) D | 17 | 0.46% | 19 | 0.53% |
| Low compound myopic astigmatism | (-3) - 0 D | 296 | 8.00% | 291 | 8.14% |
| Moderate compound myopic astigmatism | (-3) - (-6) D | 51 | 1.38% | 49 | 1.37% |
| High compound myopic astigmatism | < (-6) | 21 | 0.57% | 18 | 0.50% |
| Simple miopic astigmatism | 0 D | 289 | 7.24% | 294 | 7.60% |
| Total | 3991 | 100.00% | 3870 | 100.00% |