Moderate to severe refractive errors: spherical equivalent refraction (SER) > + 2.00 diopters (D) or < − 3.00 D (the preexisting refractive errors should be corrected with spectacles)
Anisometropia > 1.50 D
Structural ocular pathology
Significant systemic disorders (for example, neurodevelopmental delay)
Unable to visit on a regular follow-up (family planning to move out of area)