title: The effect of the selected factors on corneal endothelial cell loss following phacoemulsification.
abstract: BACKGROUND
  Corneal endothelium is a single layer of cells, which do not regenerate. Damage to the endothelium can take place in the course of certain diseases and after intraocular operations. When the number of endothelial cells decreases, corneal decompensation can occur. Pre- and postoperative measurement of the number of the corneal endothelial cells can help assess the degree of corneal damage during the surgery.
  
  
  OBJECTIVE
  To compare the effect of various factors, such as: sex, age, corneal incision, intraocular pressure, cataract density, visual acuity and surgeon's experience on corneal endothelial cell loss following uneventful phacoemulsification.
  
  
  METHODS
  365 patients (114 men and 251 women aged 19 to 91 years) undergoing phacoemulsification were examined preoperatively and postoperatively at 4 weeks. 68 eyes underwent phacoemulsification through a 1.8 mm microincision and 297 eyes through a standard 2.75 mm incision. Patients were operated on by four surgeons.
  
  
  RESULTS
  There was a significant difference in the postoperative endothelial cell loss relative to the degree of cataract hardness (p < 0.001). Endothelial cell loss was significantly higher in patients aged 71 and above than in the remaining age groups. Significant differences in the postoperative endothelial cell loss were observed in relation to the clear corneal incision size (p < 0.01). Preoperative best corrected visual acuity influenced the postoperative endothelial cell loss in a statistically significant way (p < 0.05). Endothelial cell loss was strongly influenced by the surgeon's experience.
  
  
  CONCLUSIONS
  Surgeon's experience, hardness of cataract, type of corneal incision, age and preoperative visual acuity influenced endothelial cell loss at 4 weeks following uneventful phacoemulsification, however such factors as sex and intraocular pressure showed no statistically significant influence on corneal endothelial cell loss.
authors.forename: Michał
authors.initials: M
authors.lastname: Orski
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Synder
authors.forename: Dorota
authors.initials: D
authors.lastname: Pałenga-Pydyn
authors.forename: Wojciech
authors.initials: W
authors.lastname: Omulecki
authors.forename: Michał
authors.initials: M
authors.lastname: Wilczyński
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002452:Cell Count; D048429:Cell Size; D055954:Corneal Endothelial Cell Loss / Q000209:etiology* / Q000473:pathology*; D004728:Endothelium, Corneal / Q000473:pathology; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D019654:Lens Implantation, Intraocular / Q000009:adverse effects* / Q000379:methods; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000009:adverse effects* / Q000379:methods; D011183:Postoperative Complications / Q000473:pathology*; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult