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- Title
Long-term follow-up of astigmatic keratotomy for corneal astigmatism after penetrating keratoplasty.
- Authors
Böhringer, Daniel; Dineva, Nina; Maier, Philip; Birnbaum, Florian; Kirschkamp, Thomas; Reinhard, Thomas; Eberwein, Philipp
- Abstract
Purpose To report the long-term stability of paired arcuate corneal keratotomies ( AKs) in patients with high regular postpenetrating keratoplasty astigmatism. Methods Retrospective chart review of best-corrected visual acuity, refraction and keratometric values of 41 eyes with AK between 2003 and 2012. Results Magnitude of median target induced astigmatism vector was 9.2 dioptres (Dpt). We reached a median magnitude of surgically induced astigmatism vector of 9.81 Dpt and a median magnitude of difference vector of 5.5 Dpt. In keratometry, we achieved a net median astigmatism reduction by 3.3 Dpt. The average correction index was 1.14, showing a slight overcorrection. Irregularity of keratometric astigmatism increased by 0.6 Dpt, and spherical equivalent changed by 1.75 Dpt. Monocular best spectacle corrected visual acuity increased from preoperatively 20/63 (0.5 log MAR) to 20/40 (0.3 log MAR) postoperatively. Median gain on the ETDRS chart was two lines. Long-term follow-up showed a median keratometric astigmatic increase by 0.3 Dpt per year. Conclusion Arcuate corneal keratotomies is a safe and effective method to reduce high regular corneal astigmatism following penetrating keratoplasty but has limited predictability. The long-term follow-up shows an increase of keratometric astigmatism by 0.3 Dpt/year, equalizing the surgical effect after 10 years.
- Subjects
VISUAL acuity; VISION disorders; CORNEA surgery; REFRACTION (Optics); ASTIGMATISM (Optics); REFRACTIVE errors
- Publication
Acta Ophthalmologica (1755375X), 2016, Vol 94, Issue 7, pe607
- ISSN
1755-375X
- Publication type
Article
- DOI
10.1111/aos.13061