Chinese parents are among the most anxious about myopia in the world — and for good reason. China's youth myopia rate exceeds 70%, and the government has declared it a national health emergency. The good news: three interventions have been proven to slow myopia progression. Together they form the "three pillars" of prevention.
中国父母对近视的焦虑程度在全球名列前茅——这是有原因的。中国青年近视率超过 70%，政府已宣布其为全国健康紧急事件。好消息是：三种干预措施已被证明可以减缓近视发展。它们一起构成了预防的"三板斧"。
Outdoor time is by far the most effective single intervention for myopia prevention. The mechanism is well understood: bright outdoor light (10,000-25,000 lux on a sunny day, versus 100-500 lux indoors) stimulates dopamine release in the retina. Dopamine acts as a signal that slows the elongation of the eyeball during childhood development [1].
户外时间是目前为止最有效的单一近视预防干预措施。其机制已被充分理解：明亮的户外光线（晴天 10,000-25,000 勒克斯，而室内仅 100-500 勒克斯）刺激视网膜释放多巴胺。多巴胺作为一个信号，在儿童发育期间减缓眼球的拉长 [1]。
The numbers: A landmark study in Guangzhou tracked 1,900 children over 3 years. One group had an extra 40 minutes of outdoor time added to their school day. The outdoor-time group had a 23% lower incidence of myopia. A meta-analysis of 25 studies found that each additional hour of weekly outdoor time reduced the odds of myopia by 2% [1].
数据：广州一项里程碑式研究追踪了 1,900 名儿童 3 年。一组在学校每天增加 40 分钟的户外时间。户外时间组的近视发病率降低了 23%。一项包含 25 项研究的荟萃分析发现，每周每多一小时的户外时间，近视的几率降低 2% [1]。
Even cloudy days matter: outdoor light on an overcast day is still 10-25 times brighter than indoor lighting. The activity also matters less than the light exposure — walking, biking, playing tag, or just sitting outside reading all count. The key is that the child's eyes are exposed to bright, broad-spectrum light. Two hours per day is the widely recommended minimum [2].
即使是阴天也有效：阴天的户外光线仍然比室内照明亮 10-25 倍。活动本身不如光照暴露重要——走路、骑车、捉迷藏，或者只是坐在外面看书都算数。关键是孩子的眼睛暴露在明亮、广谱的光线下。每天两小时是广泛推荐的最低限度 [2]。
The second pillar is early detection through regular screening. The key metric is hyperopic reserve (also called hyperopic defocus or plus lens reserve). Children are born farsighted — their eyeballs are too short. As they grow, the eyeball elongates and the hyperopic reserve decreases. Tracking this reserve tells you how much room the child has before they become nearsighted [2].
第二支柱是通过定期筛查进行早期检测。关键指标是远视储备。儿童天生是远视的——他们的眼球太短。随着成长，眼球拉长，远视储备减少。追踪这个储备可以告诉你孩子在变成近视之前还有多少空间 [2]。
Target values by age: At age 3, a healthy reserve is +2.00D to +3.00D. At age 6 (before entering primary school), +1.00D to +1.50D. At age 8, +0.50D to +1.00D. At age 10, +0.25D to +0.75D. If a child's reserve drops below +0.50D at age 6, myopia is likely to develop within 1-2 years. This early warning gives parents a window to intensify outdoor time and consider medical interventions [3].
各年龄段目标值：3 岁时，健康储备为 +2.00D 到 +3.00D。6 岁时（进入小学前），+1.00D 到 +1.50D。8 岁时，+0.50D 到 +1.00D。10 岁时，+0.25D 到 +0.75D。如果一个孩子在 6 岁时储备低于 +0.50D，近视很可能在 1-2 年内发展。这个早期预警给父母提供了一个窗口来加强户外时间和考虑医学干预 [3]。
Axial length (眼轴长度) is another crucial metric measured in millimeters. Normal adult axial length is about 23.5 mm. In children, it grows from about 22 mm at birth. An axial length exceeding 24 mm in a child under 8 is a strong predictor of myopia. Many optometrists now recommend tracking axial length every 6 months for children with myopic parents.
眼轴长度是另一个关键指标，以毫米为单位测量。正常成年人眼轴长度约为 23.5 mm。儿童从出生时约 22 mm 开始增长。8 岁以下儿童眼轴长度超过 24 mm 是近视的强烈预测指标。许多验光师现在建议给父母近视的孩子每 6 个月追踪一次眼轴长度。
Orthokeratology — commonly called OK lenses or ortho-k — involves specially designed rigid contact lenses worn overnight. They temporarily reshape the cornea, providing clear vision during the day without glasses. More importantly, clinical studies have shown that OK lenses can slow myopia progression by 40-60% compared to wearing standard glasses [3].
角膜塑形术——通常称为 OK 镜或 ortho-k——涉及夜间佩戴的特别设计的硬性隐形眼镜。它们暂时重塑角膜，白天无需眼镜就能有清晰视力。更重要的是，临床研究表明，与传统眼镜相比，OK 镜可以减缓 40-60% 的近视进展 [3]。
OK lenses are not suitable for every child. The minimum age is typically 8-9 years old, and the child must be able to handle the lens insertion and cleaning routine with parental supervision. The cost is significant ($1,500-3,000 per year in most markets), and strict hygiene is non-negotiable — improper cleaning can lead to serious corneal infections. However, for children with rapidly progressing myopia (≥0.75D per year), OK lenses are the most effective medical intervention currently available [3].
OK 镜并不适合每个孩子。最低年龄通常为 8-9 岁，孩子必须在父母监督下能够处理镜片插入和清洁程序。成本相当高（大多数市场每年 1,500-3,000 美元），严格的卫生是不可妥协的——不当清洁可能导致严重的角膜感染。然而，对于近视快速进展（每年 ≥0.75D）的儿童，OK 镜是目前可用的最有效的医学干预手段 [3]。
Action plan for parents: (1) Ensure 2+ hours of outdoor time daily — non-negotiable. (2) Screen at age 3, 5, and 7 — track hyperopic reserve and axial length. (3) If myopia is progressing (≥0.50D per year), consult an optometrist about OK lenses or low-dose atropine. (4) Enforce the 20-20-20 rule during near work. (5) Do NOT rely on "eye exercises" to prevent myopia — they don't work for this purpose.
家长行动计划：（1）确保每天 2 小时以上的户外时间——没有商量余地。（2）在 3 岁、5 岁和 7 岁进行筛查——追踪远视储备和眼轴长度。（3）如果近视进展（每年 ≥0.50D），咨询验光师关于 OK 镜或低浓度阿托品。（4）在近距离工作时强制执行 20-20-20 法则。（5）不要依赖"眼保健操"来预防近视——它们对预防没有效果。
China's myopia epidemic is driven by a combination of intense academic pressure, limited outdoor time, and early digital exposure. The three pillars approach — outdoor time, screening, and medical intervention — represents the best available defense. No single pillar is enough; they work best in combination. Parents who implement all three give their children the strongest possible protection against myopia progression [1].
中国的近视流行是由高强度学业压力、有限的户外时间和早期数字暴露共同驱动的。三板斧方法——户外时间、筛查和医学干预——代表了最好的可用防御。没有单独一板斧足够；它们组合在一起效果最好。实施这三者的父母给他们的孩子提供了对抗近视进展的最强保护 [1]。
StarPupil helps kids build healthy screen habits. Combine with outdoor time for best results.StarPupil 帮助孩子建立健康的屏幕习惯。配合户外时间效果最佳。