Insulin Resistance & Ocular Degeneration

Why the two curves don't track each other exactly — even when the correlation is very high:

The solid line shows the percentage of adults with insulin resistance across the entire population — everyone with measurable insulin resistance, regardless of what condition it causes them. Because insulin resistance is the upstream root cause of many different diseases — type 2 diabetes, fatty liver, cognitive decline, cardiovascular disease and more — this curve rises relatively gradually as it reflects a burden shared across all of those outcomes.

The dotted line shows the prevalence of the specific condition studied on this page — in this case, only the people for whom insulin resistance has expressed itself as ocular degeneration (AMD, glaucoma, and diabetic retinopathy combined, age-standardised). This curve can rise more steeply because it captures decades of accumulated cases: someone may develop insulin resistance at 35 but not manifest significant retinal damage until their 60s, so even a modest early rise in insulin resistance translates into a much larger rise in diagnosed cases years later — particularly as the population ages.

The r value (e.g. r = 0.96) is a correlation coefficient. It doesn't measure whether the two lines are the same height — it measures how consistently they move together over time. An r of 0.96 means that 96% of the rise in ocular degeneration over the past five decades is statistically explained by the parallel rise in insulin resistance.

What the r value tells you:
0.50–0.70 — Modest connection. The two trends are related but other factors are involved.
0.70–0.90 — Strong connection. Insulin resistance is a major driver, alongside other contributing causes.
0.90 and above — Dominant connection. Insulin resistance accounts for the overwhelming majority of the trend. At this level, it is difficult to argue that other factors are primarily responsible. The values seen across these studies — consistently 0.90 to 0.97 — place insulin resistance firmly in this category for every condition shown.

Insulin Resistance Questionnaire →

The mechanistic pathway — how IR damages the eye: Insulin resistance triggers four converging pathways that degrade retinal tissue. 1. Chronic low-grade inflammation (TNF-α, IL-6, VEGF) inflames retinal blood vessels, degrades the retinal pigment epithelium, and drives drusen formation — the hallmark of early AMD. 2. Oxidative stress from mitochondrial dysfunction increases free radical production; the retina, with its exceptionally high oxygen demand, is acutely vulnerable — photoreceptor and RPE damage accumulates over decades. 3. Vascular dysfunction and sodium retention (via the same renal mechanism driving hypertension) raise intraocular pressure and impair retinal microvasculature — directly contributing to glaucoma. 4. Insulin receptors throughout the retina govern photoreceptor survival and VEGF regulation; when retinal insulin signalling fails, photoreceptor degeneration accelerates independently of systemic glucose levels. This is not a coincidental association — it is a multi-pathway causal sequence now documented across multiple independent research groups. Reversing insulin resistance through dietary change (very low-carbohydrate diet, intermittent fasting, gut restoration) addresses all four mechanisms simultaneously.

Why the USA and UK figures differ: The USA figure reflects broader diagnostic uptake and a higher baseline prevalence of severe metabolic syndrome, driven partly by an ultra-processed food supply more extreme than the UK's. The UK figure reflects the same underlying trend at a lower absolute level, consistent with marginally lower rates of severe obesity. Both populations show the same directional trajectory: AMD, glaucoma and diabetic retinopathy rising in close parallel with insulin resistance over five decades. Ocular degeneration data for both countries is drawn from NHANES retinal imaging, CDC/VEHSS modelled estimates, Beaver Dam Eye Study, Blue Mountains Eye Study (USA), and Royal College of Ophthalmologists, UK Biobank retinal data, and Macular Society reports (UK). Combined ocular degeneration figures are age-standardised.

Data sources

Many people with this condition have at least one other insulin-resistance-driven condition. See the full picture — all conditions, their r values, prevalence data, and 50-year rise figures in one place:  See all conditions →

← Return to Start Your Remission Here