Natural light stimulation can prevent the occurrence of myopia！

The occurrence of myopia is due to the rapid growth of the eye axis, which stretches the eyeball and the retina moves back, causing the distance between the light focus and the retina to become farther, resulting in blurred images.
Outdoor natural light intensity is normally between 11080-18176 lux, even if you are in the shade of a tree, its intensity is 5556-7876 lux, wearing a hat is also 4112-8156 lux, wearing sunglasses The light intensity level is between 1792-6800 lux. between. However, the light intensity of the indoor artificial light environment is only 112-156 lux. People work indoors for a long time, and the eyes have no chance to receive high-intensity natural light outdoors, which leads to the rapid growth of the eye axis.
Outdoor natural light is a full-spectrum high-intensity light, which is conducive to promoting dopamine secretion. Dopamine-mediated ocular growth inhibition, acting upstream of the choroid, causes a transient increase in choroidal thickness. Intravitreal injections of the nonspecific dopamine agonists apomorphine and quinpirole were found to cause a significant increase in choroidal thickness in myopic eyes.
Changes in choroidal thickness within 3 hours after dopamine agonist injection in eyes with -10D lenses
Choroidal thickness is negatively correlated with axial length, and the thicker the choroid, the shorter the axial length of the eye. Choroidal thickening appears to be a signal to slow axial growth, as long as the choroid thickens, axial growth will slow.
When people do not have free time to go outdoors due to work or study, the eyes receive high-intensity natural light stimulation, which leads to a decrease in dopamine secretion, thus thinning the choroid, accelerating the growth of the eye axis, and promoting the occurrence and development of myopia. In addition, insufficient natural light stimulation can also lead to abnormal development of the eyeball and cornea, which can also induce myopia.
Now myopia has tended to develop at a younger age. More and more children and adolescents suffer from myopia early, and adults directly develop into high myopia. Therefore, it is recommended that children should go outdoors more, and the focus is not on activities, but on the eyes. Increase natural light stimulation to prevent the occurrence and development of myopia. Giving students time for outdoor activities every day needs urgent attention.