Czy Azja Wschodnia powstrzyma epidemię krótkowzroczności (Dział Zagraniczny Podcast#252)
Summary: The Myopia Epidemic in East Asia and Beyond
The video discusses the growing global crisis of nearsightedness (myopia), with a specific focus on why East Asia has become the epicenter of this health issue.
- The Global Scale of Myopia: Research indicates that myopia rates have tripled since 1990. Projections suggest that by 2050, half of the world's population will be nearsighted [00:03:25].
- Definition and Risks: Myopia occurs when the eyeball grows too long (axial length), causing light to focus in front of the retina rather than on it [00:04:28]. "Pathological myopia" (above -6 diopters) can lead to serious complications like retinal detachment, cataracts, glaucoma, and even blindness [00:04:49].
- The East Asian Epidemic: In regions like Taiwan, Japan, South Korea, and Singapore, nearly 80-90% of high school graduates are nearsighted [00:09:54]. In Taiwan specifically, myopia rates jump from 9% in kindergarten to 50% by the seventh grade [00:18:45].
- Causes - Education vs. Genetics: While genetics play a minor role (about 2% of cases), the rapid spike in myopia is attributed to environmental factors [00:11:57]. The primary driver is the intense educational pressure in "Confucian societies," where children spend excessive hours reading and writing from a very young age [00:16:41].
- The Role of Light and Dopamine: Studies show that natural sunlight is crucial for eye health. High-intensity light (3,000 to 100,000 lux) triggers the release of dopamine in the retina, which prevents the eyeball from elongating [00:30:30]. Artificial indoor light (200-500 lux) is insufficient to provide this benefit [00:30:22].
- Screens vs. Near-Work: Interestingly, the epidemic in Asia began before the widespread use of smartphones [00:10:34]. Experts argue that "near-work" (reading books or writing) is just as damaging as screen time; the critical factors are the distance of the object from the eyes and the lack of time spent outdoors [00:38:46].
- Prevention and Solutions:
- The "120 Minute" Rule: Taiwan has implemented programs encouraging children to spend at least two hours (120 minutes) outdoors daily to combat the trend [00:32:22].
- Atropine Drops: Low-dose atropine drops are used to slow the progression of myopia in children, though they are not a "cure" [00:27:34].
- Policy Changes: China has recently introduced regulations to limit homework for younger children and has cracked down on private after-school tutoring (Bushibans) to reduce the burden on children's eyes [00:25:08].
- Advice for Europe: While myopia rates in Europe are rising (15-30%), they remain lower than in East Asia [00:36:39]. Experts suggest maintaining a balance between education and outdoor play, avoiding reading in the dark, and ensuring regular eye screenings for children to manage the condition early [00:41:42].