Prescribing spectacles for children too young to cooperate with subjective refinement of refraction requires that the refractive error be estimated by objective means. Clinical studies frequently employ autorefractors for measurement of refractive error, as they have been shown to have reproducibility that is superior to that of a retinoscopist.1 However, reproducibility does not equate to accuracy, and so for instances where the measurement is being used to prescribe spectacles, it is important that the accuracy of the autorefractor be confirmed.