Lasting Effects: Seven Year Results of the CastropNomogram for Femtosecond Laser-Assisted PairedCorneal Arcuate Incisions
Sprache des Titels:
Long-term results of arcuate incisions are rarely reported. This is unfortunate as long-termstability of astigmatic correction is of great interest to surgeons performing astigmatic correction. Thisstudy investigates the 7 year stability of results after application of femtosecond laser-assisted arcuateincisions with the Castrop nomogram.
Prospective interventional case series at the Augen- und Laserklinik, Castrop-Rauxel,Germany. Single site, single surgeon study. Seven year results of cataract patients with low tomoderate corneal astigmatism receiving femtosecond laser-assisted arcuate incisions using aTechnolasVictus SW 2.7 (Bausch & Lomb Inc, Dornach, Germany) were assessed and compared to 1year results. Outcome evaluation was based on astigmatic vector analysis, manifest refraction, andvisual acuity.
The study analyzed 19 eyes of 19 patients 7 years after surgery. Ocular residual astigmatismchanged from -0.26 to -0.39 D. Preoperative corneal astigmatism was -1.51 D. Correction Indexchanged from 1.0 to 1.16. The magnitude of difference vector changed from 0.26 to 0.39 D. The indexof success changed from 0.20 to 0.29. Spherical equivalent remained stable. A slight tendency tochange toward astigmatic overcorrection was mainly observed for patients with preoperative with therule astigmatism, but not with patients with against the rule astigmatism.
The Castrop nomogram showed stable results 7 years after surgery. Similar to toric IOLsurgery, it is advisable to be less aggressive when correcting with the rule astigmatism, to avoidovercorrection over a long period.
Arcuate incision; astigmatism; castrop nomogram; femtosecond laser; keratotomy.