What is Under-Correction

Myopia is already the most common ocular disorder in the world, and its prevalence continues to increase worldwide. Higher myopic refractive errors are associated with an increased risk of vision-threatening complications, which has led to many investigations into the underlying cause of myopia and the mechanisms of myopia progression in order to prevent or delay the onset of myopia and slow its progression. This chapter briefly reviews ocular development and emmetropization, summarizes the known risk factors for myopia onset and myopia progression, reviews current clinical interventions for controlling myopia, and provides practice management recommendations. Finally, instances of syndromic myopia, which have not been shown to be responsive to myopia control treatments, are reviewed.