Table 1.

Eligibility Criteria for Participation in Ready-Made Spectacles Trial

Eligibility Criteria	Action
Presenting vision 20/40 or worse in better eye	Prescribed spectacles if required through ChildSight (Helen Keller International, New York, NY)
Minimum uncorrected spherical refractive error of ±1 diopter
Best corrected distance acuity < 20/25*	Referred for further ophthalmologic evaluation
Cylinder power ≥2 D*
Anisometropia (for myopia, sphere difference ≥2 D, for hyperopia, sphere difference ≥1 D*
Other eye disease affecting vision*

D = diopters.

^*Exclusion criteria were based on the protocol of the Childsight screening program where refractive services for complicated cases were not provided directly at schools.