New technique for femtosecond laser creation of clear corneal incisions for cataract surgery.
J Cataract Refract Surg
; 43(1): 80-86, 2017 01.
Article
em En
| MEDLINE
| ID: mdl-28317683
ABSTRACT
PURPOSE:
To evaluate the changes in corneal topography and corneal higher-order wavefront aberrations with the use of a new technique in which clear corneal incisions (CCIs) for cataract surgery are created with a femtosecond laser.SETTING:
IRCCS Fondazione G.B. Bietti, Rome, Italy.DESIGN:
Prospective randomized case series.METHODS:
Cataract surgery patients were randomized into 2 groups. In the study group, a 3-plane CCI was created with a femtosecond laser. In the control group, the single plane-angled CCI was created manually using disposable knives. Simulated keratometry (K) values and corneal higher-order wavefront aberrations with 3.5 mm and 6.0 mm pupils were compared between groups.RESULTS:
Each group comprised 10 eyes. At 6 months, the mean change in K values from preoperatively was 0.16 diopter (D) ± 0.14 (SD) in the study group and 0.34 ± 0.16 D in the control group, with no differences between groups (P > .05). The manual CCI significantly increased corneal higher-order wavefront aberrations with 3.5 mm and 6.0 mm pupils (both P < .05). In the study group, corneal higher-order wavefront aberrations increased significantly with a 6.0 mm pupil only (P ≤ .02). The induced changes in corneal higher-order wavefront aberrations were significantly different between groups over both pupil sizes (P < .05).CONCLUSIONS:
The femtosecond laser-created CCI did not induce significant changes in simulated K or corneal higher-order wavefront aberrations over the mesopic pupil size. The lower amount of induced corneal higher-order wavefront aberrations with the new technique than with manual CCI could be related to the different geometry of the 2 techniques.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Facoemulsificação
/
Córnea
/
Terapia a Laser
Tipo de estudo:
Clinical_trials
/
Observational_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Cataract Refract Surg
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article