Tear samples are taken to compare the levels of inflammatory markers (IL 1a, IL6 and MMP 9) pre-and post treatment with topical insulin in normal saline compared to standard therapy and normal saline in diabetics with dry eyes and also to correlate the IL 1a, IL6 and MMP 9 levels with clinical outcomes in diabetics with dry eyes treated with topical insulin in normal saline, standard therapy and normal saline
60 samples are take to determine the effects of topical insulin on tear inflammatory mediators interleukin 1a, interleukin 6 and matrix metalloprotenase 9 in diabetics with dry eye disease.