Comparison of penetrating keratoplasty performed with a femtosecond laser zig-zag incision versus conventional blade trephination.
Ophthalmology
; 116(9): 1638-43, 2009 Sep.
Article
en En
| MEDLINE
| ID: mdl-19646760
ABSTRACT
PURPOSE:
To evaluate visual outcomes and astigmatism in patients who underwent penetrating keratoplasty (PK) with 2 different incision techniques.DESIGN:
Retrospective comparison of a consecutive surgical series.PARTICIPANTS:
Fifty-seven consecutive patients who underwent PK at the University of California, Irvine, academic referral practice.METHODS:
A comparison of 49 eyes of 43 patients that underwent femtosecond laser zig-zag incision pattern PK versus 17 eyes of 14 patients that underwent conventional Barron suction trephination PK performed contemporaneously. All PKs were closed with an identical, 24-bite running nylon suture technique. MAIN OUTCOMEMEASURES:
Topographically determined astigmatism, best spectacle-corrected visual acuity (BSCVA), and recovery of full visual potential.RESULTS:
The postoperative follow-up ranged from 1 to 12 months. There was a significant difference in average astigmatism between the groups at postoperative month 1 (P = 0.013) and 3 (P = 0.018). By month 3, the average astigmatism was 3 diopters (D) in the zig-zag group and 4.46 D in the conventional group. Of the patients with normal macular and optic nerve function (n(ZZ) = 32; n(con) = 14), a significant difference in BSCVA was seen at month 1 (P = 0.0003) and month 3 (P = 0.006) with 81% of the zig-zag group versus 45% of the conventional group achieving BSCVA of > or =20/40 by month 3 (P = 0.03).CONCLUSIONS:
The femtosecond laser generated zig-zag-shaped incision results in a more rapid recovery of BSCVA and induces less astigmatism compared with conventional blade trephination PK. FINANCIAL DISCLOSURE(S) Proprietary commercial disclosure may be found after the references.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Queratoplastia Penetrante
/
Enfermedades de la Córnea
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Terapia por Láser
Tipo de estudio:
Observational_studies
/
Prognostic_studies
Límite:
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Ophthalmology
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos