Table 1.
Definition of refractive groups using change in spherical equivalent refraction (SER) between timepoints.
| Refractive group | Spherical Equivalent Refraction |
|---|---|
| Persistent emmetropesa | Between -0.50D to +1.00D |
| Persistent myopes | ≤-0.50D at each timepoint |
| Progressing myope | Initial SER of ≤-0.50D and increase of ≤-0.50D between timepoints |
| Incident myopia | Resulting SER of ≤-0.50D |
| Persistent hyperope | >+1.00D at each timepoint |
| Emmetropizing hyperopes | Initial SER>+1.00D and subsequent SER between -0.50D and +1.00D |
a
Mean change in the persistent emmetrope group was -0.11D (maximum change of −0.83D) over the four-year study period.