PMID: 9159675Apr 1, 1997Paper

Postoperative astigmatism and relative strength of tunnel incisions: a prospective clinical trial

Journal of Cataract and Refractive Surgery
N AndersJ Wollensak

Abstract

To investigate the influence of incision depth and site on wound strength and postoperative astigmatism. Virchow Memorial Hospital Eye Clinic, Berlin, Germany. In this prospective, randomized study, 180 patients with a 7.0 mm tunnel incision depth of 300 and 500 microns; limbal incision and scleral incision; temporal scleral incision and scleral incision at the 12 o'clock position; temporal limbal incision and limbal incision at the 12 o'clock position. Postoperative astigmatism was measured by keratometry and videokeratoscopy 1 day, 1 and 4 weeks, and 8 months postoperatively. Wound strength was measured with an ophthalmodynamometer on the first postoperative day and after 1 week at the site with the least mechanical stability adjacent and posterior to the primary incision. The temporal incision, which was performed 1.0 mm behind the surgical limbus, led to induced astigmatism of 0.65 diopters (D) +/- 0.23 (SD) after 8 months. When incision was at the 12 o'clock position, the induced astigmatism was 0.97 +/- 0.41 D. Induced astigmatism was highest following a limbal incision in the 12 o'clock position (1.33 +/- 0.63 D). This effect was less pronounced with a temporal incision. Incision depth did not significantly influence ind...Continue Reading

References

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Citations

Dec 6, 2005·Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·T BöhmD T Pham
Sep 21, 2004·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Christopher WirbelauerDuy Thoai Pham
Sep 29, 2007·International Ophthalmology·Yelda OzkurtOmer K Doğan
Jul 25, 2012·International Ophthalmology·Erhan Özyol, Pelin Özyol
Apr 30, 2002·Journal of Cataract and Refractive Surgery·Stephan KohnenThomas Kohnen
Apr 26, 2002·Journal of Cataract and Refractive Surgery·Zvia BurganskyElisha Bartov
Jan 26, 2000·Journal of Cataract and Refractive Surgery·N LyhneM Kjeldgaard
Oct 2, 2013·International Ophthalmology·Erhan Özyol, Pelin Özyol
Jan 27, 2005·Clinical & Experimental Ophthalmology·John Landers, Henry Liu
Oct 1, 2009·Clinical & Experimental Ophthalmology·Jun WangPeng-Fei Zhao
Oct 28, 1998·Biophysical Journal·R H Newton, K M Meek
Nov 4, 2006·Journal of Cataract and Refractive Surgery·Luis F TorresArturo S Chayet
Dec 2, 2006·Journal of Cataract and Refractive Surgery·Edmondo BorasioVincenzo Maurino
May 19, 1998·Journal of Cataract and Refractive Surgery·P ErnestM Rhem
Nov 20, 2009·European Journal of Ophthalmology·Rajiv B KhandekarKamta P Pandey

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