Myopia, commonly called shortsightedness, is a condition in which light is focussed in front of the retina, resulting in blurred vision. Refractive surgery can reduce or even eliminate your need for glasses or contacts.The most common procedures are performed with an excimer laser. Recent prevalence surveys in China using cycloplegic autorefraction showed that 16.2% of school-aged children in rural areas of northern China aged between 5 and 15 years were myopic.
Comparatively, much higher prevalence rates of myopia were reported from recent studies on schoolchildren of similar age in large metropolitan cities in southern China. 38.1% in Guangzhou. 36.7% in Hong Kong.Our initial research suggests that the pupil responds more if these cells have been exposed to a lot of sunlight in the previous few days. That could serve as a proxy for how much dopamine the eye has been producing.