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Characteristics of the study population
| Total number of babies (male, female) | 50 (22–28) | |
| Average gestational age (weeks) | 29.88 (27–32) | |
| Average weight at birth (g) | 1,426.40 (800–1,750) | |
| Refraction at 5 years | Right eye | Left eye |
| Average SE (range) | −2.75 (−13 to +5) | −3.20 (−12 to +4) |
| Average astigmatism | −1.70 D | −1.72 D |
Abbreviations: SE, spherical equivalent; D, diopters.
