Artelac (hypromellose) eye drops, for treating dry eye in cases where the production of natural tears is reduced, are available from Nucare. The company says that the pharmacy-only product is preservative-free, safe to use with contact lenses and can be used as little or as often as required (net price, 30 x 0.5ml single dose units £9.95, retail price, 30 £14.95).