title: Comparison of central corneal thickness measurements by Orbscan II and Pentacam after corneal refractive surgery.
abstract: OBJECTIVE
  To compare the accuracy of postoperative pachymetry between Orbscan II (Bausch & Lomb) scanning-slit corneal topography/pachymetry and the Pentacam (Oculus) rotating Scheimpflug camera.
  
  
  METHODS
  Central corneal thickness (CCT) was determined in 24 patients (48 eyes) before and after laser in situ keratomileusis (LASIK) or Epipolis LASIK (Epi-LASIK) procedures. All eyes were examined by Orbscan II and Pentacam prior to refractive surgery and at the first, fourth, and twelfth week postoperatively. The residual CCT (RCCT) measured by each instrument was compared to the theoretical RCCT.
  
  
  RESULTS
  On the first, fourth, and twelfth week after the refractive surgery, the mean RCCT measurements by Orbscan II were 413 +/- 72, 435 +/- 65, and 440 +/- 69 microm, respectively. Those of Pentacam were 434 +/- 51, 436 +/- 53, and 438 +/- 50 microm, respectively. Orbscan II measurements at the postoperative first and fourth week were significantly smaller than the theoretical RCCT (P < 0.01, P < 0.01, paired t test). There was no statistical difference between the theoretical RCCT and the Pentacam measurements at any stage.
  
  
  CONCLUSIONS
  The Orbscan II measurement values of postoperative corneas tended to be thinner than the theoretical values, but not those of the Pentacam.
authors.affiliation: Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan. jmatsuda@ophth.kpu-m.ac.jp.|Department of Ophthalmology, National Center for Geriatrics and Gerontology, Obu, Japan. jmatsuda@ophth.kpu-m.ac.jp.
authors.forename: Jumpei
authors.initials: J
authors.lastname: Matsuda
authors.affiliation: Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan.|Baptist Eye Clinic, Kyoto, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Hieda
authors.affiliation: Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kinoshita
mesh_terms: D000328:Adult; D003315:Cornea / Q000473:pathology*; D019781:Corneal Topography / Q000379:methods*; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D009929:Organ Size; D010781:Photography / Q000379:methods*; D011184:Postoperative Period; D015203:Reproducibility of Results
references.citation: J Cataract Refract Surg. 2005 Sep;31(9):1729-35
references.pmid: 16246776
references.citation: Ophthalmology. 2006 Jun;113(6):937-41
references.pmid: 16751036
references.citation: J Refract Surg. 1998 May-Jun;14(3):312-7
references.pmid: 9641422
references.citation: Graefes Arch Clin Exp Ophthalmol. 2006 May;244(5):596-602
references.pmid: 16175371
references.citation: Ophthalmology. 2001 Feb;108(2):317-20
references.pmid: 11158806
references.citation: Curr Eye Res. 2007 Feb;32(2):89-94
references.pmid: 17364741
references.citation: J Cataract Refract Surg. 2004 May;30(5):1067-72
references.pmid: 15130645
references.citation: J Cataract Refract Surg. 2007 Jul;33(7):1177-82
references.pmid: 17586372
references.citation: J Cataract Refract Surg. 2002 Feb;28(2):248-52
references.pmid: 11821205
references.citation: Ophthalmology. 2003 Mar;110(3):511-5
references.pmid: 12623813
references.citation: J Cataract Refract Surg. 2006 Aug;32(8):1331-5
references.pmid: 16863970
references.citation: J Refract Surg. 2007 May;23(5):487-91
references.pmid: 17523511
references.citation: Ophthalmology. 2003 Oct;110(10):1926-30
references.pmid: 14522766
references.citation: J Cataract Refract Surg. 2007 May;33(5):841-7
references.pmid: 17466859
references.citation: Br J Ophthalmol. 2007 Apr;91(4):551-7
references.pmid: 17372341
references.citation: J Cataract Refract Surg. 2001 May;27(5):681-5
references.pmid: 11377895
references.citation: Br J Ophthalmol. 1999 Jul;83(7):774-8
references.pmid: 10381661
references.citation: Ophthalmology. 2000 Jul;107(7):1328-32
references.pmid: 10889107
references.citation: Br J Ophthalmol. 2004 Apr;88(4):466-8
references.pmid: 15031156
references.citation: Nippon Ganka Gakkai Zasshi. 2007 Jun;111(6):447-53
references.pmid: 17601057
references.citation: Ophthalmology. 2006 Feb;113(2):177-83
references.pmid: 16458090
references.citation: J Cataract Refract Surg. 2005 Mar;31(3):571-3
references.pmid: 15811747
references.citation: Cornea. 2005 Nov;24(8):920-4
references.pmid: 16227833
references.citation: Ophthalmology. 1999 Feb;106(2):406-9; discussion 409-10
references.pmid: 9951499
references.citation: Ophthalmology. 2001 Apr;108(4):666-72; discussion 673
references.pmid: 11297480
references.citation: J Cataract Refract Surg. 2002 Feb;28(2):253-8
references.pmid: 11821206
references.citation: Cornea. 2004 Nov;23(8 Suppl):S59-64
references.pmid: 15448482
references.citation: J Cataract Refract Surg. 2003 Jul;29(7):1313-8
references.pmid: 12900238
references.citation: Am J Ophthalmol. 2006 Jan;141(1):7-12
references.pmid: 16386970
references.citation: Ophthalmology. 2002 Jul;109(7):1298-302
references.pmid: 12093654
references.citation: Optom Vis Sci. 2005 Oct;82(10):892-9
references.pmid: 16276321