 The efficacy of different classes of artificial tears non-pharmaceutical will be examined in patients that report dry eyes by prescribing each category of treatment 0.40 Sodium Hyaluronate Clinitas Soothe, 0.15 Sodium Hyaluronate Hyabak, 0.25 Carboxymethylcellulose, electrolyte balanced Theratears, and Phospholipid liposomal spray Tears Again for a month in turn following a short wash-out period and to examine their tear film and ocular surface after each one. 