الفهرس 
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Abstract
The study conducted on 44 eyes of 44 patients aging over 40 years old whom cataract surgery by phacoemulsification was performed to. Patients were examined 1day before surgery, 7 days, 30 days, and 90 days postoperatively. The ocular examination used included tear film breakup time (TBUT) measurement, Schirmer-1 test and dry eye symptoms (DES) were also recorded. Patients in this study were assessed for overall changes in the tear film after cataract surgery by phacoemulsification. After that they were divided into 2 groups according to the presence of D.M. into non-diabetic group (22 eyes) and diabetic group (22 eyes). Finally, we assessed if there were risk factors, which may affect the tear film changes as D.M. and age of the patients. Our results showed that after assessment of the whole patients, there was significant difference (P<0.001), (P<0.001) of the TBUT, and Schirmer-1test measurements respectively between 1day preoperatively and 7days, 30days, and 90days postoperatively. According to the DES, also there were significant differences between 1 day preoperatively and 7 days, 30 days, and 90 days postoperatively where P values were (P<0.001), (P<0.001), (P=0.006), and (P<0.001) respectively. We also found that there was significant difference between the diabetic and non-diabetic groups in all the tear film parameters, either preoperatively or postoperatively; according to the TBUT, and Schirmer-1test the P value between the two groups was (P<0.001), (P<0.001) respectively through the whole period of examination. According to the DES the difference between the two groups was statistically insignificant preoperatively (P=0.189), but the difference between the two groups was statistically significant (P=0.002), (P<0.001) and (P<0.001) on 7 days, 30 days and 90 days postoperatively respectively.