Common eye drop preservative may harm eyes with long use: Experts

Experts warn that a common preservative in eye drops, PHMB, may harm the ocular surface with long-term use. While it prevents contamination, studies link it to irritation, dryness, and delayed healing. Risks are higher in children and those using drops regularly. Doctors recommend limiting prolonged use and opting for preservative-free alternatives to protect long-term eye health.