Visual recovery after corneal crosslinking for keratoconus: a 1-year follow-up study.
Graefes Arch Clin Exp Ophthalmol
; 251(3): 803-7, 2013 Mar.
Article
em En
| MEDLINE
| ID: mdl-22892583
ABSTRACT
PURPOSE:
To evaluate visual recovery and intraocular straylight in keratoconus patients 3 months and 1 year after corneal crosslinking (CXL) PATIENTS ANDMETHODS:
Thirty-three eyes of 28 consecutive patients with mild to moderate keratoconus were included. The following were assessed at baseline, 3 months and 1 year after CXL corrected distance visual acuity (CDVA), intraocular straylight, spherical equivalent (SE), keratometry (Kmax and K min (Diopters D and axis), the regularity index and pachymetry. Changes from baseline were calculated using mixed linear regression models.RESULTS:
The CDVA remained unchanged 3 months after CXL (-0.003 (95 % CI -0.038 to 0.044); p = 0.880) and improved after 1 year (-0.042 (95 % CI -0.078 to -0.007; p = 0.021)). The mean straylight value increased significantly by 0.27 (95 % CI 0.18 to 0.35; p < 0.001) 3 months after CX and normalized to preoperative values after 1 year (0.06 (95 % CI -0.03 to 0.14; p = 0.215)). SE improved from the mean preoperative value of -2.61 D (95 % CI -3.83 to -1.39) by 1.95 (95 % CI 1.03 to 2.86; p < 0.001) at 3 months and remained stable at the 1-year follow-up visit (2.17 (95 % CI 1.21 to 3.12; p < 0.001)). Parameters of of keratometry changed only minimally. The regularity index remained almost unchanged at 3 months (2.45 (95 % CI -4.97 to 9.88; p = 0.503)) and decreased by 6.97 (95 % CI -14.08 to 0.14; p = 0.054). Pachymetry decreased by 44.0 µm (95 % CI 56.1 to 31.9; p < 0.001) at 3 months and almost returned to preoperative values at 12 months (-11.3 µm (95 % CI -27.9 to 5.3; p = 0.175)).CONCLUSIONS:
In accordance with the decrease in CDVA and patients' complaints of disability due to glare, intraocular straylight increased 3 months after surgery. One year after CXL, there was an increase in CDVA due to an improved SE and regularity index, and intraocular straylight had normalized.
Texto completo:
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Acuidade Visual
/
Córnea
/
Reagentes de Ligações Cruzadas
/
Ceratocone
Tipo de estudo:
Observational_studies
/
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Graefes Arch Clin Exp Ophthalmol
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
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