Effects On Tear Film Of Proliferative Diabetic Retinopathy Patient After Vitrectomy And Phacoemulsificatio

ObjectiveTo evaluate tear film changes and recoveries of proliferative diabetic retinopathy patient,after vitrectomy and phacoemulsificatio.MethodsTo evaluate tear film function changes after vietretomy:according to the selection and exclusion criterias of this study,42 consecutive patients undergoing vitrectomy (42 eyes)were involved in this prospective study.Postoperatively, all(42 eyes) were dropped with TobraDex, and given mydriasis and antiglaucoma eyedrops when necessary. Uncomfortable symptoms (dry sensation,foreign body sensation,Burning sensation) were inquired, as well as tear break-up time(BUT), Schirmer test(ST) value and corneal fluorescein staining(CFS) were measured 3 day preoperatively plus 7,14,30 days postoperatively. The results were analysed statistically.Results:At 7 day postoperatively, the uncomfortable symptoms scores and CFS scores increased significantly (P<0.05), while the stable tear film failed to form. At 7 days postoperatively, the uncomfortable symptoms scores incresed singficantly (P<0.05), and returned to their preoperative values at 14 days postoperatively (P>0.05).At 7,14 days postoperatively, the mean BUT decreased significantly (P＜0.05), the mean ST value scores and CFS scores increased significantly (P<0.05). At 30 days postoperatively, the mean BUT still decreased significantly (P＜0.05), the mean ST value and CFS scores returned to their preoperative values (P>0.05).ConclusionsVitrectomy significantly alters the stability of tear film. Only partial tear film function returned to preoperative values until 30 days postoperatively.