Lasting Effects: Seven Year Results of the CastropNomogram for Femtosecond Laser-Assisted PairedCorneal Arcuate Incisions
Sprache des Titels:
Englisch
Original Kurzfassung:
Abstract
Purpose:
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.
Methods:
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.
Results:
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.
Conclusions:
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.
Keywords:
Arcuate incision; astigmatism; castrop nomogram; femtosecond laser; keratotomy.
Sprache der Kurzfassung:
Englisch
Englische Kurzfassung:
Abstract
Purpose:
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.
Methods:
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.
Results:
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.
Conclusions:
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.
Keywords:
Arcuate incision; astigmatism; castrop nomogram; femtosecond laser; keratotomy.
Forschungs-