title: Early changes in corneal edema following torsional phacoemulsification using anterior segment optical coherence tomography and Scheimpflug photography.
abstract: OBJECTIVE
  To assess corneal edema after torsional phacoemulsification using anterior segment optical coherence tomography (AS-OCT) and Scheimpflug photography (Pentacam).
  
  
  METHODS
  Seventy-six eyes with cataract surgery were randomized into 2 groups: a 2.2 mm micro-coaxial incision group (n = 37) and a 2.8 mm standard incision group (n = 39). Patients were examined preoperatively and at 1 day, 1 week and 1 month postoperatively. Incision architecture and pachymetry at the wound level were measured by AS-OCT. The corneal volume within 3.0 and 10.0 mm circles of the cornea was measured using Pentacam.
  
  
  RESULTS
  The cumulative dissipated energy (CDE) was lower in the micro-coaxial incision (2.2 mm) group than in the standard incision (2.8 mm) group (P = 0.043). Corneal edema measurements showed less corneal thickness at the endothelial side of the incision on postoperative day 1 in the micro-incision group (1061 ± 76 vs. 1153 ± 97 μm, P = 0.041). The corneal volume within the 10.0 mm circle was less on postoperative day 1 in the micro-incision group (63.75 ± 4.83 vs. 65.97 ± 4.52 mm(3), P = 0.035). The endothelial cell count did not change significantly throughout the study.
  
  
  CONCLUSIONS
  The micro-coaxial 2.2 mm incision may incur slightly less damage than the 2.8 mm standard incision in the context of torsional phacoemulsification. Observation of corneal morphology and damage using AS-OCT and Pentacam can be helpful in the evaluation and quantification of fine corneal edema.
authors.affiliation: Laboratory of Ophthalmology and Visual Science, Korean Eye Tissue and Gene Bank Related to Blindness, College of Medicine, The Catholic University of Korea, Seoul, Korea.|Department of Ophthalmology, Affiliated Hospital, Yanbian University Medical College, Jilin, China.
authors.forename: Ying-Jun
authors.initials: YJ
authors.lastname: Li
authors.affiliation: Department of Visual Optics, Division of Health Science, Baekseok University, Cheonan, Korea.
authors.forename: Hyo-Jin
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Laboratory of Ophthalmology and Visual Science, Korean Eye Tissue and Gene Bank Related to Blindness, College of Medicine, The Catholic University of Korea, Seoul, Korea. ckjoo@catholic.ac.kr.|Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Seocho-gu, Seoul, 137-701, Korea. ckjoo@catholic.ac.kr.
authors.forename: Choun-Ki
authors.initials: CK
authors.lastname: Joo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000869:Anterior Eye Segment / Q000473:pathology* / Q000601:surgery; D002386:Cataract / Q000150:complications*; D002452:Cell Count; D015715:Corneal Edema / Q000175:diagnosis* / Q000209:etiology; D004728:Endothelium, Corneal / Q000473:pathology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000009:adverse effects*; D010781:Photography; D011183:Postoperative Complications; D011446:Prospective Studies; D041623:Tomography, Optical Coherence