The major factor contributing to faster myopia progression is from the younger age of the children. In this way, in order to control the myopia of the children, we recommend to:
|Age 7 ~ 8||+0.50 D or less|
|Age 9 ~ 10||+0.25 D or less|
|Age 11 or elder||emmetropia|
Near Work vs Outdoor Times
The major factor contributing to faster myopia progression on the living style is mostly on near work. On the other hand, when staying outdoors and focusing on distant objects, your eye muscles get a chance to relax.
|close distances continuously||<20 cm|
|periods of time continuously||>45 mins|
|每日1-2小時日間戶外活動||good for prevention|
Due to an increase in schoolwork, tablets, cellphones, computers, and possible parental pressure, Hong Kong children and teens are now at a higher risk for excessive myopia than children and teenagers in Western countries. This is primarily due to environmental factors, as the amount of time teenagers spend in school is increasing, resulting in more near works.
Gifford, K. L., Richdale, K., Kang, P., Aller, T. A., Lam, C. S., Liu, Y. M., … & Sankaridurg, P. (2019). IMI–clinical management guidelines report. Investigative ophthalmology & visual science, 60(3), M184-M203.
Yam, J. C., Tang, S. M., Kam, K. W., Chen, L. J., Yu, M., Law, A. K., … & Pang, C. P. (2020). High prevalence of myopia in children and their parents in Hong Kong Chinese Population: the Hong Kong Children Eye Study. Acta ophthalmologica, 98(5), e639-e648.