Myopia control efficacy of spectacle lenses with highly aspherical lenslets: results of a 5-year follow-up study.

Purpose: To evaluate myopia control efficacy in myopic children wearing spectacle lenses with highly aspherical lenslets (HAL) for 5 years.

Methods: This is a randomized, double-masked extended trial. Myopic children aged 8 to 13 years who were originally allocated to the HAL group in the 2-year clinical trial.