Systane Eye Drops is a sterile solution composed of polyethylene glycol 400, propylene glycol, hydroxypropyl guar, boric acid, calcium chloride, magnesium chloride, potassium chloride, sodium chloride, zinc chloride, and polyquad0.001%. Systane Lubricating Eye Drops are a comfort solution that moisturises the surface of your eyes, providing fast, long-lasting relief from dryness, irritation, burning, stinging, grittiness, or foreign body sensations caused by environmental factors such as dust, smoke, ozone, UV light rays, dry heat, air conditioning, wind, drafts, cosmetics, or a reduced blink frequency caused by prolonged television viewing or concentrated computer screen work.