The genetical component shows an association between the refractive error of the parents and their children. The more myopic parents a child has, the higher the probability for a myopic outcome in the adulthood.
Outdoor activity influences the myopia onset. Once myopia was developed, outdoor time does not influence the progression anymore. The more a child spends time outdoors during daylight, the later will be the potential myopia onset.
Myopia progression and myopia onset is associated with near work time and distance. The odds of myopia increase by 2% for every one diopter-hour (DH) of near work per week.
