title: Clinical utility of femtosecond laser-assisted astigmatic keratotomy after cataract surgery.
abstract: OBJECTIVE
  To examine the clinical utility of femtosecond laser-assisted astigmatic keratotomy (FSL-AK) for eyes after cataract surgery.
  
  
  METHODS
  Eight eyes of 6 patients with an intraocular lens and corneal astigmatism of 2.0 diopters (D) or more underwent FSL-AK. The mean preoperative manifest cylindrical refraction was 2.88 ± 0.64 D and the mean corneal astigmatism was 2.84 ± 0.83 D. Paired symmetrical arcuate incisions were created with the same settings, except for the incision depth. Uncorrected distance visual acuity (UDVA), manifest cylindrical power, and surgically induced astigmatism (SIA) were measured at 1 day, 1 week, and 1 month postoperatively. Fourier analysis of corneal topography and incision depths measured with anterior-segment optical coherence tomography were evaluated 1 month postoperatively.
  
  
  RESULTS
  In all eyes, the UDVA improved at 1 week and 1 month postoperatively, and the manifest cylinder also decreased postoperatively, while the SIA showed overcorrections in 6 eyes. Fourier analysis showed decreases in spherical and regular astigmatic components and increases in higher-order irregularity. The mean incision depth was measured as 60 µm deeper than the intended depth.
  
  
  CONCLUSIONS
  The FSL-AK effectively reduced corneal astigmatism and improved the UDVA, although it was demonstrated that the deeper incisions led to overcorrection.
authors.affiliation: Miyata Eye Hospital, 6-3 Kurahara-cho, Miyakonojo, Miyazaki, 885-0051, Japan, nejima@miyata-med.ne.jp.
authors.forename: Ryohei
authors.initials: R
authors.lastname: Nejima
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Terada
authors.forename: Yosai
authors.initials: Y
authors.lastname: Mori
authors.forename: Miyuki
authors.initials: M
authors.lastname: Ogata
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Minami
authors.forename: Kazunori
authors.initials: K
authors.lastname: Miyata
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D002387:Cataract Extraction / Q000009:adverse effects*; D003315:Cornea / Q000503:physiopathology / Q000601:surgery*; D019781:Corneal Topography; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D053685:Laser Therapy; D054018:Lasers, Excimer / Q000627:therapeutic use*; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D041623:Tomography, Optical Coherence; D014792:Visual Acuity / Q000502:physiology