Association between baseline angle width and induced angle opening following prophylactic laser peripheral iridotomy.
Invest Ophthalmol Vis Sci
; 54(5): 3763-70, 2013 May 01.
Article
em En
| MEDLINE
| ID: mdl-23661374
ABSTRACT
PURPOSE:
To evaluate the association between baseline angle width and laser peripheral iridotomy (LPI)-induced opening of the anterior chamber angle.METHODS:
Anterior segment optical coherence tomography images captured before and after LPI were analyzed to determine the angle opening distance at 250 µm (AOD250), 500 µm (AOD500), and 750 µm (AOD750) from the scleral spur; trabecular-iris space area at 500 µm (TISA500) and 750 µm (TISA750) from the scleral spur; angle recess area at 750 µm (ARA750) from the scleral spur; and trabecular-iris angle (TIA). Differences in preoperative and postoperative measurements for the anterior chamber angle width parameters were compared by paired Student's t-tests. Univariate and linear mixed-effects regression models were used to examine the association between baseline and LPI-induced opening of anterior chamber angle width parameters.RESULTS:
Eighty-four eyes of 52 primary angle closure suspects were included in the analysis. AOD250, AOD500, AOD750, TISA500, TISA750, ARA750, and TIA significantly increased following LPI by paired Student's t-tests (all P < 0.0001). Lower baseline measurements were significantly associated with greater postoperative opening in all anterior chamber angle width parameters in both univariate and linear mixed-effects regression analyses (all P < 0.05).CONCLUSIONS:
Our results showed significant opening of the anterior chamber angle width after LPI and demonstrated an inverse association between baseline and LPI-induced opening of the anterior chamber angle width, such that eyes with a more crowded anterior chamber angle undergoing LPI had a greater magnitude of increase in anterior chamber angle width after the procedure.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Glaucoma de Ângulo Fechado
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Iris
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Cegueira
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Iridectomia
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Terapia a Laser
Tipo de estudo:
Observational_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Invest Ophthalmol Vis Sci
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Estados Unidos