TITLE:
Non-Penetrating Femtosecond Laser Intrastromal Astigmatic Keratotomy Performed during Laser-Assisted Cataract Surgery: Results on Keratometric Astigmatism
AUTHORS:
Anna Kaczmarek, Claudia Brockmann, Thomas Laube
KEYWORDS:
Intrastromal Astigmatic Keratotomy, ISAK, Corneal Astigmatism, Cataract Surgery
JOURNAL NAME:
Open Journal of Ophthalmology,
Vol.7 No.4,
October
31,
2017
ABSTRACT: Purpose: To investigate the efficacy of non-penetrating femtosecond laser intrastromal
astigmatic keratotomy (ISAK) in terms of topographic and refractive
changes. Methods: Retrospective study including 42 eyes (35 patients)
with a corneal astigmatism between 0.5 and 1.5 D. All eyes underwent femtosecond
laser-assisted cataract surgery with ISAK for astigmatism management
using the Catalys laser system (Johnson & Johnson Vision). Visual acuity, refraction,
as well as corneal topographic and corneal endothelial cell density
(ECD) changes were evaluated during a 12-month follow-up. Astigmatic
changes were analyzed using the Alpins vector method. Results: A significant
reduction in manifest cylinder was observed at 1 month postoperatively (p =
0.03), with no significant changes afterwards (p = 0.90). A total of 38.1%,
52.4% and 59.2% of eyes had a manifest cylinder of 0.50 D or lower preoperatively
and at 1 and 12 months after surgery, respectively. A significant reduction
was found in topographic astigmatism at 1 month postoperatively (p Conclusions: Femtosecond laser assisted ISAK is an effective and safe option
to reduce corneal astigmatism during cataract surgery and consequently refractive
astigmatism.