Systane Nighttime Lubricant Eye Ointment

About Systane Nighttime Lubricant Eye Ointment Active ingredients: Mineral oil and white petrolatum Preservative-free 3.5g (1/8 oz) tube Description (by Rebecca) Vaseline, more or less.  Which ointment to choose? There are lots of ointments on the market, and they're all made of the same stuff mostly - white petrolatum and mineral oil. The main thing that distinguishes one product from another is the proportions of those two ingredients. Systane and Genteal ointments are 94% white petrolatum and only 3% mineral oil. For plenty of people the differences may not matter, but certainly I've noticed some over the years who find that the proportions matter for their purposes, so comparison shopping can be helpful. Should I be using ointment at all? Ointments are attractive for overnight use due to their staying power - unlike polymer drops and gel drops, they don't just dissolve and dissipate in a short time. However, not everyone who has moderate to severe overnight dry eye symptoms