As a person with long standing and increasingly poor eye health I was very interested in this news about the massive rise in Asian myopia, the suspected cause, and suggested prevention. Consider how much outdoor time your children get during the day…
Professor Morgan argues that many children in South East Asia spend long hours studying at school and doing their homework. This in itself puts pressure on the eyes, but exposure to between two and three hours of daylight acts as a counterbalance and helps maintain healthy eyes.
The scientists believe that a chemical called dopamine could be playing a significant part. Exposure to light increases the levels of dopamine in the eye and this seems to prevent elongation of the eyeball.
Additionally, more than one study has found, this helpful eye health fact:
An analysis of eight previous studies by University of Cambridge researchers found that for each additional hour spent outside per week, the risk of myopia reduced by 2%.
Exposure to natural light and time spent looking at distant objects could be key factors
With the added benefit of proper amounts of vitamin D (we usually are woefully deficient) and the implications of that deficiency in such maladies as diabetes make it even more important to make sure we, and our children, get more time outside in the sunshine.