Clear, colourless, sterile eye drops containing hydroxyethylcellulose 0.44% w/w BP and sodium chloride EP 0.35% w/w. Artificial Tears 20 are clear, colourless, s e eye drops formulated using; hydroxyethylcellulose 0. 44% w/w BP and sodium chloride EP 0. 35% w/w which works together to pr you with tear moisture that your eyes may be struggling to produce. We often suffer from dry eyes as it is easy for eyes to dry out; which is why these clever eye drops were designed to help you tackle this uncomfortable problem to leave you with clean, fresh and hydrated eyes.