at what age does myopia set in
Using the same method, in 1999â2004, myopia prevalence was estimated to have climbed to 41.6%. A study of 2,523 children in grades 1 to 8 (age, 5â17 years) found nearly one in 10 (9.2%) have at least â 0.75 diopters of myopia.
Generally, nearsightedness first occurs in school-age children. Because the eye continues to grow during childhood, it typically progresses until about age 20. However, nearsightedness may also develop in adults due to visual stress or health conditions such as diabetes.