Programm                 "Degeneration und Regeneration– Grundlagen, Diagnostik und Therapie"

   Hotel Registration
   Welcome address
Beteiligte Gesellschaften
   Societies involved
DOG Information
   DOG Information
Eröffnung des Kongresses
   Opening Ceremony
Ablauf der Tagung 2003
   General overview of congress
Lageplan der Räumlichkeiten
   Map of Congress Center
Wissenschaftliche Themen
   Scientific topics
Wissenschaftliches Programm
   Scientific program
   Poster Presentation
Begleitende Veranstaltungen
   Accompanying program
   Working sessions
   Social program
Allgemeine Informationen
   General Information
   Index of Authors
   Commercial exhibitors

DOG Homepage


Long-term Results of Phototherapeutic Keratectomy (o-PTK) with 193 nm Excimer Laser for Macular Corneal Dystrophy

Hafner A., Seitz B., Langenbucher A., Naumann G. O. H.
Department of Ophthalmology, Universiy of Erlangen

Purpose: To investigate the functional and morphological long-term outcome of o-PTK for macular corneal dystrophy.
Method: Out of a total of 317 PTKs, between 6/1994 and 10/1998 10 consecutive o-PTKs (5 OD, 5 OS) were performed in eyes with superficial opacities caused by macular dystrophy. The intended laser ablation depth after epithelial debridement and pannectomy varied from 20 to 100 µm. We used the slit-scanning-mode with a repetition rate of 20/s or 25/s and a pulse rate of 1774 ± 502 (976 - 2422). In most cases a 6,0 mm metall mask was used to protect peripheral Bowman`s layer.
Results: Mean follow-up was 4.5 ± 3.1 (maximum 8.7) years. Best-corrected visual acuity increased from preoperatively 0.3 ± 0.2 to 0.5 ± 0.2, initially. The mean spherical equivalent increased from -0.9 ± 1.1 D preoperatively to -0.4 ± 1.8 D postoperatively. Likewise, mean keratometric central power decreased from 44.5 ± 0.7 D preoperatively to 42.5 ± 0.6 D postoperatively. During follow-up we saw recurrences in 7 eyes. The mean time period without recurrences was 3.3 ± 0.5 years. The earliest recurrence was seen after 0.8 years. In 6 eyes a penetrating keratoplasty was performed. In none of the transplants a recurrence was observed up to now (mean follow-up after penetrating keratoplasty: 0.5 to 4.2 years). The maximum follow-up of the other 3 eyes without documen

Zurück | Back