PF Drops Hypromellose 0.3% Preservative Free Eye Drops PF Drops Hypromellose 0.3% Preservative Free Eye Drops provide long-lasting, soothing relief for mild to moderate dry eyes associated with the lack of natural tears or lubrication as well as prolonged relief from discomfort due to environmental elements. Hypromellose is recommended & prescribed extensively by GPs & ophthalmologists.PF Drops Hypromellose 0.3% Preservative Free Eye Drops do not contain preservatives or phosphates so are less likely to cause additional irritation to the eye, making them ideal for people who are sensitve to the preservatives in other kinds of eye drops. Users of soft contact lenses should remove them before applying the product & wait for at least 15 minutes before replacing the lenses. All PF Drops products are supplied in Moorfield Pharmaceutical's innovative & patented multi-dose Ophthalmic Squeeze Dispenser (OSD) that prevents microbial contamination for up to 60 days after first use without the need for preservatives.