Contact lens care and use intersects with water quality in ways that are relevant for PFAS. While the primary health concern from PFAS remains systemic effects through ingestion, contact lens wearers in PFAS-affected areas have additional specific considerations regarding water use in lens care routines.
Contact Lens and Water Interaction
Ophthalmological guidance universally advises against rinsing contact lenses with tap water due to infection risk from microorganisms including Acanthamoeba. This guidance indirectly addresses PFAS exposure in lens care: contact lens solutions are manufactured to pharmaceutical purity standards that exclude PFAS, while tap water (with PFAS) is already discouraged for lens contact for safety reasons unrelated to PFAS.
Eye Exposure Pathways
Direct PFAS exposure to the eye through tap water contact — face washing, water splashing — is a potential exposure pathway though the conjunctival mucosa is less permeable than gastrointestinal mucosa. Published research on ocular PFAS exposure and eye health effects is limited, making this a low-priority concern relative to ingestion exposure. The precautionary measure of using filtered water for face washing in areas with very high PFAS concentrations adds minimal cost to a household already filtering drinking water.
Primary Focus on Ingestion
For contact lens wearers concerned about PFAS, the primary protective measure remains the same as for all individuals in PFAS-affected areas: certified water filtration for drinking and cooking water. The ingestion pathway delivers orders of magnitude more PFAS to the body than any ocular exposure route. Lens care practices should follow standard ophthalmological guidance regarding sterile solutions, with the comfort that this guidance already minimizes direct lens-water contact.