Mean refractive error at 2 months of follow up, by quarter
| Jan–March Mean (SD) | April–June Mean (SD) | July–Sept Mean (SD) | Oct–Dec Mean (SD) | 1999 Mean (SD) | |
|---|---|---|---|---|---|
| Spherical equivalent | −1.38 (1.44) | −1.62 (1.29) | −1.42 (1.48) | −1.58 (1.28) | −1.50 (1.38) |
| Absolute sphere | 1.59 (1.21) | 1.71 (1.18) | 1.59 (1.30) | 1.67 (1.16) | 1.64 (1.22) |
| Cylinder | 2.43 (1.33) | 2.39 (1.62) | 2.60 (1.83) | 2.42 (1.52) | 2.47 (1.61) |