If you have dry eyes, your doctor probably told you to drink more water, use artificial tears, and consider omega-3 supplements. The theory makes sense: omega-3s are anti-inflammatory, and dry eye is increasingly understood as an inflammatory condition.
如果你有干眼症，医生可能会告诉你多喝水、使用人工泪液、考虑Omega-3补充剂。这个理论说得通：Omega-3具有抗炎作用，而干眼症越来越多地被理解为一种炎症性疾病。
The meibomian glands in your eyelids produce the oily layer of your tear film. When they get inflamed and clogged, your tears evaporate too quickly. Omega-3s should help reduce that inflammation. DHA (docosahexaenoic acid) makes up about 60% of the fatty acids in your retina—your retina literally runs on omega-3s [1]. So the connection between dietary fat and eye health is real, and it's biologically fundamental.
眼睑中的睑板腺产生泪膜的油性层。当它们发炎和堵塞时，泪液蒸发太快。Omega-3应该有助于减少这种炎症。DHA占视网膜脂肪酸的约60%——视网膜literally依靠Omega-3运行 [1]。所以膳食脂肪与眼睛健康之间的联系是真实的，而且是生物学基础的。
But here's where it gets complicated: when researchers actually tested this theory with rigorous clinical trials, the results were not what anyone expected. The scientific story of omega-3s and eye health is a masterclass in why we need randomized controlled trials, not just plausible theories.
但这里变得复杂了：当研究人员用严格的临床试验验证这个理论时，结果出乎所有人的意料。Omega-3与眼睛健康的科学故事是绝佳案例，说明了为什么我们需要随机对照试验，而不仅仅是合理的理论。
A 2018 large-scale randomized trial published in JAMA Ophthalmology—one of the most respected medical journals—found that omega-3 supplementation provided NO statistically significant benefit for dry eye symptoms compared to a placebo [2]. The DREAM study (Dry Eye Assessment and Management) involved over 12,000 participants in a double-blind, placebo-controlled design. The results were clear: omega-3s didn't outperform the placebo.
2018年发表在《JAMA眼科》上的一项大规模随机试验——最受尊敬的医学期刊之一——发现与安慰剂相比，Omega-3补充剂对干眼症状没有提供任何统计学上的显著益处 [2]。DREAM研究（干眼评估与管理）采用双盲、安慰剂对照设计，涉及超过12,000名参与者。结果很清楚：Omega-3并不优于安慰剂。
This was a shock. For years, clinicians had recommended fish oil for dry eyes based on smaller studies and strong biological plausibility. The DREAM trial showed that the supplement form of omega-3s doesn't work for dry eye—at least not in a way that patients can feel.
这是一个震惊。多年来，临床医生基于小型研究和强生物合理性推荐鱼油治疗干眼。DREAM试验表明，补充剂形式的Omega-3对干眼无效——至少在患者能感受到的层面上无效。
Does that mean omega-3s are useless for eyes? Not exactly. The DREAM study looked at moderate-to-severe dry eye disease. Other smaller studies suggest omega-3s MAY help with mild dry eye symptoms, particularly when combined with lifestyle changes. And while they might not directly fix dry eyes, omega-3s ARE proven to reduce the risk of age-related macular degeneration—the leading cause of blindness in people over 60 [3].
那这意味着Omega-3对眼睛无用吗？不完全是。DREAM研究关注的是中度到重度干眼症。其他较小的研究表明，Omega-3可能有助于轻度干眼症状，特别是与生活方式改变相结合时。虽然它们可能不能直接解决干眼问题，但Omega-3确实被证明可以降低年龄相关性黄斑变性的风险——60岁以上人群失明的主要原因 [3]。
So what should you actually do? The most evidence-based approach is straightforward:
所以你应该怎么做？最基于证据的方法很直接：
The most effective dry eye treatments remain: warm compresses (melts clogged oils in the meibomian glands), artificial tears, and addressing the root cause. An omega-3-rich diet is a healthy choice for overall wellness and retinal protection, but it shouldn't be your first-line treatment for dry eyes.
最有效的干眼治疗仍然是：热敷（融化睑板腺中堵塞的油脂）、人工泪液和解决根本原因。富含Omega-3的饮食对于整体健康和视网膜保护是健康的选择，但不应该是干眼症的一线治疗。
Eat fish, don't just take pills. Whole-food omega-3s support retinal health and reduce AMD risk. But for dry eyes, the evidence for supplements is weak. Focus on warm compresses, blinking exercises, and screen breaks first.
吃鱼，不要只吃药片。全食物Omega-3支持视网膜健康并降低AMD风险。但对于干眼症，补充剂的证据很弱。首先关注热敷、眨眼练习和屏幕休息。
StarPupil's dry eye module helps you maintain healthy blinking.StarPupil的干眼模块帮助你保持健康的眨眼。