Microplastics Trigger Inflammation in Your Cornea

When microplastic particles touch the cells on the surface of your eye, those cells fight back with inflammation. And the type of inflammation depends on how long the plastic sits there.

What the Study Found

A 2026 study in Environmental Pollution exposed human corneal epithelial cells to microplastic particles and measured the inflammatory response. The cells released cytokines (inflammatory signaling molecules) in a phase-specific pattern. Different cytokines kicked in at different stages of exposure.

That means the inflammation isn't a simple on/off switch. It's a cascading response that changes over time, potentially becoming chronic with ongoing exposure.

Your Eyes Are Constantly Exposed

Microplastics are in household dust, outdoor air, and tap water. Every time you blink, you're potentially trapping plastic particles on the surface of your cornea. Contact lens wearers face extra risk because the lens can hold particles against the eye for hours.

What You Can Do

Keep indoor air clean with a HEPA filter. Don't rub your eyes. If you wear contacts, clean them thoroughly and consider switching to daily disposables. Use preservative-free eye drops to flush irritants.

Browse our non-toxic home essentials for cleaner indoor air.

Also see non-toxic kitchen essentials for safer alternatives.

Source: Wu D, Lim CHL, Jaeger JE, et al. (2026). Environ Pollut.