Analysis of factors associated with vision after cataract surgery in chronic renal failure patients on dialysis

Background To analyze the related factors of visual acuity after phacoemulsification and intraocular lens implantation in chronic renal failure (CRF) patients. Methods We retrospectively analyzed 42 patients (51 eyes) with CRF (failure, uremia) on hemodialysis or peritoneal dialysis and 40 patients (50 eyes) without CRF as a control group. Each individual underwent physical and laboratory examinations including best corrected visual acuity (BCVA), slit lamp examination, intraocular pressure, corneal endothelial cell count, fundus examination and optical coherence tomography (OCT) for macular examination. The patients with abnormal platelet, liver and kidney function, coagulation function received treatment accordingly to reduce the perioperative risk. All patients underwent phacoemulsification with IOL implantation. Follow-up examinations were performed at 1 week, 1 month and 3 months after surgery and included BCVA, slit lamp examination, noncontact IOP, dilated fundus examination and OCT of the macula. Results In control group the preoperative RBC, HB, Cr, and urea values were not associated with the pre- or postoperative BCVA. The RBC, HB, Cr, urea, SBP, DBP, preoperative BCVA and postoperative BCVA values were all significantly different between CRF and control group( P < 0.05). Conclusion In CRF patients, the RBC, HB, Cr and Urea indexes should be monitored before the cataract operation for guarded visual outcome. The pre-existing ocular comorbidities could significantly compromise the vision. The CRF patients could achieve relatively good visual outcome after cataract surgery when the underlaying diseases are effectively managed.