Can microplastic particles from contact lens solutions irritate your eyes?

What's actually in it

Microplastics have been found in contact lens solutions, eye drops, and even in the tears of people who wear contacts. The lenses themselves are made of plastic polymers that can shed tiny fragments over time. Storage cases and solution bottles add more particles. Every time you put in your lenses or use eye drops from a plastic bottle, your eyes may be exposed.

The cornea is one of the most sensitive tissues in your body. It doesn't have the same barriers that protect your skin or gut lining.

What the research says

A 2026 study in Part Fibre Toxicol exposed human corneal epithelial cells to microplastic particles and tracked the immune response. The cells reacted with inflammatory cytokines, the chemical signals your body sends out when tissue is under attack.

The response was phase-specific, meaning different-sized particles triggered different types of inflammation. Smaller nanoplastics caused one pattern of immune activation, while larger microplastics caused another. Both were harmful, but in different ways.

Chronic low-level inflammation on the cornea can lead to dry eye syndrome, redness, and blurred vision over time. For people who already have sensitive eyes, the added irritation from microplastics could make symptoms worse.

Using eye drops from glass dropper bottles instead of plastic squeeze bottles can reduce exposure. Replacing contact lens cases regularly and rinsing lenses with fresh solution also helps minimize plastic particle buildup.