Research by the College of Optometrists has revealed that women's beauty habits are putting their eye health at risk.
Despite recommendations that eye make-up should be thrown away after six months, one in four women continues to use bacteria-ridden products that are over four years old.
A quarter of those surveyed confessed to sharing eye make-up with friends and family, even though one in 10 admitted to frequently suffering from conditions such as conjunctivitis, said the College.
Welsh women were the worst culprits. A third admitted to owning eye make-up that was over four years old while women in their late 30s and early 40s had the oldest make-up bags one in five admitted to using make-up that was over five years old.
Dr Susan Blakeney, optometric adviser to the College, said: 'Mascara can be a breeding ground for bacteria, so it's not surprising we've found nearly half of women suffer from itchy, watery and red eyes.'