Probability of Being Nearsighted (Myopia)

Myopia (nearsightedness) affects approximately 42% of Americans, according to the National Eye Institute, up from about 25% in the early 1970s. Globally, myopia is projected to affect roughly 50% of the world's population by 2050, representing a significant public health concern.

The rapid increase in myopia prevalence is attributed primarily to environmental factors: increased near-work activities (reading, screens, studying), reduced time spent outdoors, and urbanization. Genetics also play a role, with children of myopic parents at higher risk. East Asian populations have particularly high rates, with over 80% of young adults affected in countries like South Korea, China, and Singapore.

Research strongly suggests that spending more time outdoors during childhood (at least 2 hours per day) can reduce the risk of developing myopia by 30-50%. Once myopia develops, atropine eye drops, orthokeratology (overnight contact lenses), and specially designed spectacle lenses can slow its progression. Preventing high myopia (above -6 diopters) is particularly important because it significantly increases the risk of retinal detachment, glaucoma, cataracts, and macular degeneration later in life.