Demographic and ocular characteristics of the participants in the four groups
| EM | MIM | MOM | HM | |||
|---|---|---|---|---|---|---|
| Characteristics | (N=20) | (N=20) | (N=20) | (N=18) | p Value* | Post hoc† |
| Gender (male:female) | 9:11 | 11:09 | 10:10 | 9:09 | 0.940 | / |
| Age (years) | 16.6±0.9 | 16.8±0.7 | 16.8±0.8 | 16.3±0.5 | 0.172 | / |
| BCVA | 1.3±0.3 | 1.3±0.3 | 1.1±0.2 | 1.1±0.2 | 0.004 | EM>MOM; EM>HM |
| IOP (mm Hg) | 14.6±2.5 | 15.4±3.2 | 15.9±3.6 | 16.9±2.7 | 0.138 | / |
| MSE (dioptres) | −0.11±0.39 | −1.7±0.55 | −4.6±0.81 | −8.0±0.83 | <0.001 | EM>MIM>MOM>HM |
| Axial length (mm) | 23.85±0.62 | 24.22±0.77 | 25.66±0.81 | 26.58±0.87 | <0.001 | EM<MOM<HM; MIM<MOM<HM |
| DBP(mm Hg) | 75±7 | 74±9 | 73±9 | 74±9 | 0.831 | / |
| SBP (mm Hg) | 121±12 | 116±11 | 118±13 | 119±15 | 0.633 | / |
| BP amplitude (mm Hg) | 45±13 | 42±11 | 45±10 | 45±13 | 0.694 | / |
| MAP (mm Hg) | 94.3±7.0 | 91.4±8.1 | 91.7±9.3 | 92.7±9.9 | 0.707 | / |
| Mean OPP (mm Hg) | 48.3±5.2 | 45.5±5.9 | 45.2±5.7 | 44.9±6.3 | 0.239 | / |
| Pulse rate (bpm) | 76±10 | 79±9 | 82±11 | 83±11 | 0.104 | / |
| RNFL thickness (µm) | 107.1±5.8 | 103.6±7.2 | 99.7±7.1 | 98.3±6.9 | 0.001 | EM>MOM; EM>HM |
| GCC thickness (µm) | 98.6±4.3 | 97.3±5.0 | 97.5±5.5 | 95.2±4.9 | 0.217 | / |
| Rim area (mm2) | 1.56±0.29 | 1.47±0.32 | 1.39±0.24 | 1.31±0.32 | 0.066 | / |
| C/D area ratio | 0.3±0.2 | 0.3±0.1 | 0.3±0.1 | 0.3±0.2 | 0.870 | / |
Numbers displayed are mean±SD.
*All calculated by the One-way analysis of variance, except the values in bold, which were calculated by χ2 test.
†Multiple comparisons among the four refraction groups.
BCVA, best-corrected visual acuity; BP, blood pressure; C/D, cup/disc; DBP, diastolic blood pressure; EM, emmetropia; GCC, ganglion cell complex; HM, high myopia; IOP, intraocular pressure; MAP, mean arterial pressure; MIM, mild myopia; MOM, moderate myopia; MSE, mean spherical equivalent; OPP, ocular perfusion pressure; RNFL, retinal nerve fibre layer; SBP, systolic blood pressure.