title: Evaluation of Anterior Segment Parameter Changes Using the Sirius after Uneventful Phacoemulsification.
abstract: OBJECTIVE
  To investigate changes in anterior chamber depth (ACD), corneal volume (CV), anterior chamber angle (ACA), anterior chamber volume (ACV), central corneal thickness (CCT), horizontal visible iris diameter (HVID), pupil diameter (PD), and intraocular pressure (IOP) after uneventful phacoemulsification cataract surgery with intraocular lens implantation.
  
  
  METHODS
  A total of 132 eyes of 132 patients (87 men and 45 women) that underwent uneventful phacoemulsification cataract surgery and intraocular lens implantation were prospectively studied. The mean age of the patients was 63.68 ± 12.51 years. All patients were evaluated preoperatively and at 1 month postoperatively with the Sirius 3D Rotating Scheimpflug camera topography system. The ACD, CV, ACA, ACV, CCT, HVID, and PD measurements were recorded. IOP was measured using the Goldmann applanation tonometer, which was corrected for CCT of the Sirius device using Ehlers' formula.
  
  
  RESULTS
  The preoperative mean ACD, ACV, ACA, CCT, CV, PD, HVID, and IOP were 2.79 ± 0.45 mm, 124.73 ± 25.72 mm(3), 42.09 ± 7.49(0), 523.87 ± 41.97 microns, 55.37 ± 4.89 mm(3), 3.98 ± 1.23 mm, 11.72 ± 0.67 mm, and 14.74 ± 2.59 mmHg, respectively. Three months postoperatively, the mean ACD, ACV, ACA, CCT, CV, PD, HVID, and IOP were 3.45 ± 0.6 mm, 162.52 ± 23.79 mm(3), 51.46 ± 5.63(0), 526.21 ± 44.45 microns, 56.23 ± 5.12 mm(3), 2.87 ± 0.45 mm, 11.91 ± 0.75 mm, and 12.02 ± 1.83 mmHg, respectively. There was a statistically significant increase in mean postoperative ACD, ACV, ACA, CV, and HVID compared with the corresponding preoperative values (p < 0.05). CCT remained stable after surgery. Postoperative PD and IOP were significantly decreased compared to corresponding preoperative values (p < 0.05).
  
  
  CONCLUSIONS
  Preoperative measurements by the Sirius 3D Rotating Scheimpflug camera topography system might help surgeons to predict postoperative changes resulting from phacoemulsification and intraocular lens implantation. This is a noncontact, noninvasive, and comfortable system for patients that is highly reliable and repeatable for anterior segment measurements.
authors.affiliation: Department of Ophthalmology, Adıyaman University School of Medicine, Adiyaman, Turkey.
authors.forename: Ali
authors.initials: A
authors.lastname: Şimşek
authors.affiliation: Department of Ophthalmology, Adıyaman Gozde Hospital, Adiyaman, Turkey.
authors.forename: Burak
authors.initials: B
authors.lastname: Bilgin
authors.affiliation: Department of Ophthalmology, Adıyaman University School of Medicine, Adiyaman, Turkey.
authors.forename: Musa
authors.initials: M
authors.lastname: Çapkın
authors.affiliation: Department of Ophthalmology, Adıyaman University School of Medicine, Adiyaman, Turkey.
authors.forename: Şemsettin
authors.initials: Ş
authors.lastname: Bilak
authors.affiliation: Department of Ophthalmology, Adıyaman University School of Medicine, Adiyaman, Turkey.
authors.forename: Mete
authors.initials: M
authors.lastname: Güler
authors.affiliation: Department of Ophthalmology, Adıyaman University School of Medicine, Adiyaman, Turkey.
authors.forename: Ali Hakim
authors.initials: AH
authors.lastname: Reyhan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging* / Q000601:surgery; D003315:Cornea / Q000473:pathology* / Q000601:surgery; D019781:Corneal Topography / Q000379:methods*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D011184:Postoperative Period; D011446:Prospective Studies; D016896:Treatment Outcome; D014792:Visual Acuity; D055815:Young Adult
keywords: Anterior eye segment; Corneal topography; Phacoemulsification