I have dry eyes,my eyes becomes itchy,i work in computers and A/C so i visited a doctor ,he prescribed Lacryl eye drop . LACRYL EYE DROPS     5 ml Hypromellose (4000 cps) B.P.C. 0.7% w/w Sodium Chloride IP 0.490% w/w Potassium Chloride IP 0.075% w/w Calcium Chloride IP 0.048% w/w Magnesium Chloride IP 0.030% w/w Sodium Acetate IP 0.390% w/w Sodium Citrate IP 0.170% w/w      LACRYL-PLUS EYE DROPS     10 ml Polyvinyl Alcohol USP 14 mg Povidone IP 6 mg Sodium Perborate IP 0.028% w/v However the medicine store gave me Lacryl plus, which I noticed later. Is it safe to use?