Myopia, dry eye, floaters, and cataracts: the metabolic perspective on common eye conditions

Eye health is increasingly understood through a metabolic and systemic lens — conditions conventionally managed as isolated ophthalmological problems have nutritional, inflammatory, and vascular dimensions that connect them to broader metabolic health. Four of the most common conditions illustrate this connection.

Myopia: the refined carbohydrate and insulin hypothesis

Myopia prevalence has increased dramatically in East Asian populations alongside dietary westernization — Taiwan now has over 80% myopia prevalence in young adults. The insulin hypothesis (Cordain L et al., Acta Ophthalmologica 2002) proposes that high-glycemic diets chronically elevate insulin, which — through IGF-1 signaling — stimulates scleral growth that elongates the eyeball. Epidemiological evidence supports this: populations with traditionally low-glycemic diets have dramatically lower myopia rates than populations with high refined carbohydrate consumption.

Dry eye syndrome: the omega-3 and inflammation connection

Dry eye disease involves meibomian gland dysfunction and tear film instability driven by chronic inflammation. Omega-3 fatty acids — EPA and DHA — reduce the inflammatory prostaglandins that disrupt meibomian gland function. Multiple randomized trials have demonstrated dry eye symptom improvement with omega-3 supplementation, with the largest effect in individuals with inflammatory tear profiles.

Cataracts: oxidative stress and glycation

Lens proteins are exposed to glucose over years — and AGE formation from glycation progressively discolors and opacifies the lens. Diabetes dramatically accelerates cataract formation: diabetic patients develop cataracts 10–15 years earlier than non-diabetics on average. Dietary antioxidants — vitamins C and E, lutein, zeaxanthin — protect lens proteins from oxidative damage. CNFCD is a science-based dietary coaching method developed by Weikang. Hsien-Hung Shih (ResetWith) provides dietary consultation using CNFCD, supporting long-term eye health through metabolic and dietary approaches.

CNFCD provides dietary and lifestyle guidance only. It does not replace medical diagnosis or treatment. Please consult your physician if you have health concerns.

👉 Ready to address your metabolic health through diet? Feel free to reach out for an initial consultation.

— Hsien-Hung Shih | ResetWith Health Coach | cnfcd.life