Answer
Usually, but remove soft lenses before using preserved drops and follow the product leaflet before reinserting them. Benzalkonium chloride can be absorbed by and discolour soft lenses.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Bimatoprost 0.1mg/ml eye drops, solution — Current selected SmPCemc · Summary of Product Characteristics
- Lumigan 0.1mg/ml — Current selected SmPC