Many eye drops contain benzalkonium chloride (BAK), a preservative that can irritate the ocular surface. For patients with dry eye or glaucoma who need long‑term drops, preservative‑free options are a game‑changer. The UK ophthalmic drugs market research study shows that the lubricants segment (artificial tears) is growing at over 6% CAGR, driven by demand for preservative‑free formulations.

What's the cost? Preservative‑free drops are 2‑3x more expensive than preserved versions. The UK ophthalmic drugs market trends highlight that the fastest‑growing distribution channel is online pharmacies, where patients buy preservative‑free drops from Amazon or Boots.

But not everyone needs preservative‑free. If you use drops for a short course (e.g., post‑surgery), preserved drops are fine. For chronic use, preservative‑free is worth the extra cost.

The bottom line: if your eyes sting after using drops, ask about preservative‑free alternatives. Your comfort — and your corneal health — may depend on it.