Revoptom: inflammatory diet raises OAG 35%

Glaucoma is usually framed as an eye-pressure problem. That is still true — pressure is the main treatable risk factor. But a paper now getting fresh attention adds another piece to the picture: the overall inflammatory tone of someone’s diet. In a U.S. NHANES analysis, people eating the most pro-inflammatory diets were more likely to report glaucoma than people eating the least inflammatory diets. Review of Optometry pushed the finding back into the conversation on April 29, 2026. (reviewofoptometry.com) ### What was the actual study? This was a cross-sectional study in the *International Journal of Ophthalmology*, published in January 2025. The researchers used NHANES data from 2005 to 2008 and included 5,359 U.S. adults age 40 and older, weighted to represent roughly 109 million people. Cross-sectional is the key phrase here — it means the study looked for associations at one slice in time, not proof that diet caused glaucoma. (pmc.ncbi.nlm.nih.gov) ### What counts as an “inflammatory” diet? The paper used the Dietary Inflammatory Index, or DII. Basically, it is a score built from reported nutrient intake — fats, carbs, vitamins, minerals, alcohol, caffeine, and other components — to estimate whether a person’s diet tends to push the body toward more or less inflammation. Higher DII means more pro-inflammatory. In this dataset, higher DII also tr(pmc.ncbi.nlm.nih.gov)t if the score is capturing generally worse diet quality. (reviewofoptometry.com) ### What did they find? The headline number is the one making the rounds: people in the highest DII group had a 35% higher glaucoma risk probability than people in the lowest group. The association looked linear rather than U-shaped in this paper — as DII rose, glaucoma risk rose too. The glaucoma group also skewed older and had more smoking and alcohol exposure, which is why the authors adjusted for multiple confounders in their models. (reviewofoptometry.com) ### Why are people talking about obesity? Because the subgroup results were stronger there. The same high-versus-low DII comparison was linked to a 66% higher glaucoma risk in participants with obesity. The paper also flagged a 56% higher risk in people with diabetes and a 48% higher risk in men. That does not prove obesity amplifies the effect biologically, but it does suggest the diet-inflammation signal may be more visible in metabolically stressed groups. (reviewofoptometry.com) ### Does this mean diet causes primary open-angle glaucoma? Not yet. The catch is that the glaucoma diagnosis was self-reported, not clinically confirmed for every participant, and the study design cannot establish cause and effect. It also did not isolate primary open-angle glaucoma specifically in a way a glaucoma specialist would for a clinic(reviewofoptometry.com)eally is. (reviewofoptometry.com) ### How does this fit with the bigger literature? The broader diet-and-glaucoma literature is suggestive, not settled. A 2024 scoping review found that about 80% of included studies reported some significant diet associations, but almost all were observational and only one randomized intervention trial showed up in the whole set. That means the (reviewofoptometry.com). (frontiersin.org) ### So what should readers do with this? Treat it as a credible clue, not a clinical reversal. Anti-inflammatory eating patterns — less refined carbohydrate and excess salt, more nutrient-dense whole foods — already make sense for cardiovascular and metabolic health. If those same habits also help glaucoma risk, that is a bonus. But nobody should swap proven glaucoma care for diet tweaks. Eye-pressure control still does the heavy lifting. (reviewofoptometry.com) ### Bottom line? The new thing is not that diet “causes” glaucoma. The new thing is that another population study tied more inflammatory diets to more glaucoma, with the strongest signal in obesity. That is enough to justify more serious research — especially prospective and interventional studies — but not enough to rewrite clinical guidance yet. (reviewofoptometry.com)