About My Health Careers Internship MedBlogs Contact us
Medindia
LOGIN REGISTER
Advertisement

Lack of Sunlight, Ambient Light may Lead to Shortsightedness

by Bidita Debnath on March 25, 2015 at 11:07 PM
Font : A-A+

Lack of Sunlight, Ambient Light may Lead to Shortsightedness

In the last 30 years, Myopia or shortsightedness, has assumed 'epidemic' proportions with some countries reporting prevalence of 80-90%; the reason could simply be lack of adequate light in classrooms. Richard Hobday, an authority on sunlight and health, has compared myopia to bone disease rickets, caused by the lack of Vitamin D that you get from sunlight.

Hobday has revived a century-old theory that suggests myopia could also be linked to the lack of sunlight - or at least adequate ambient light.

Advertisement

Myopia is today a global health problem, with countries like Singapore, Taiwan and China reporting rates as high as 80-90% among children leaving secondary schools. In the west, too, rates are increasing. The cause and means of preventing of myopia are still unclear, despite 150 years of scientific research.

Hobday compares the history myopia with rickets. In the 17th century, rickets was common among children in England and reached epidemic levels. A remedy proved elusive until the 1920s, when scientists found that a lack of sunlight, resulting in Vitamin D deficiency, was the cause of rickets.
Advertisement

Myopia, like rickets, is a seasonal condition which appears to get worse in winter. Recent research on myopia has revived the old theory from the 1890s that school children who spend more time outdoors have lower levels of myopia. However, unlike rickets, low ambient light levels rather than low Vitamin D levels seem to be the deciding factor in myopia, Hobday says.

In the late 19th century it was believed that high daylight levels in schools could prevent myopia. Education departments built classrooms with large windows to try to stop children becoming short-sighted. But this theory lost traction in the 1960s, and myopia was thought to be an inherited condition.

Hobday believes it is time to revisit the theory. Though evidence that daylight in classrooms prevents myopia is lacking, he says: "It has not been investigated properly since the connection was first made in the 1860s. But, given the rapid increase in myopia among school children worldwide, this should be revisited."

Source: IANS
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News Category
What's New on Medindia
Emotional Healing
Psychosis Risk Related to Cat Parasite
Sedentary Behavior Precipitates Night-Time Hot Flashes
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.


Recommended Reading
More Years Spent in School Linked to Increased Risk of Myopia
Attaining higher levels of education and spending more years in school could increase the severity ....
Alarming Increasing Incidence of Myopia: Study
New research on myopia—how it develops, risk and protective factors and potentially effective ......
Scientists Discover New Genes Behind Myopia
24 new genes that cause myopia or short-sightedness have been identified by scientists. Myopia is a ...
Myopia Increases With Higher Level of Education
Attaining a higher level of education and spending more years in school are two factors associated ....

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use