Navegando por Palavras-chave "Cornea topography"

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    Intraocular pressure and central corneal thickness in full-term newborns
    (Consel Brasil Oftalmologia, 2017) Maestri Ferreira, Claudia Cardoso [UNIFESP]; Tavares, Ivan Maynart [UNIFESP]
    Objective: The aim of this study was to determine the central corneal thickness (CCT) and intraocular pressure (IOP) in full-term newborns and to correlate these values with the following variables: weight, sex, and post-conception age (PCA). Methods: IOP and CCT were determined in 52 full-term newborns with a mean gestational age of 39.43 +/- 1.03 weeks and a mean birth weight of 3,273 +/- 558 g. The mean age of the neonates at the time of taking the measurements was 1.15 +/- 1.38 days after birth. IOP was determined with a Tono-Pen, and CCT was determined using a handheld ultrasound pachymeter. Results: The mean overall IOP was 14.0 +/- 2.91 mmHg, and the mean IOP in male and female newborns was 13.77 +/- 2.88 mmHg and 14.32 +/- 3.05 mmHg, respectively. The mean overall CCT was 605.87 +/- 62.98 mu m, and the mean CCT in male and female newborns was 626.70 +/- 67.46 mu m and 577.45 +/- 45.50 mu m, respectively
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    Validade da topografia de córnea na cirurgia refrativa com excimer laser
    (Conselho Brasileiro de Oftalmologia, 2003-12-01) Silva Filho, Orlando da [UNIFESP]; Schor, Paulo [UNIFESP]; Campos, Mauro Silveira de Queiroz [UNIFESP]; Abreu, Mariza Toledo de [UNIFESP]; Beer, Sandra Maria Canelas [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de Mogi das Cruzes Departamento de Oftalmologia Setor de Córnea e Doenças externas
    PURPOSE: To evaluate the refractive results and safety of PRK (photorefractive keratectomy) based on the preoperative corneal topography. METHODS: 44 operated eyes, using the photorefractive keratectomy process, and which presented preoperative topographical abnormalities. The control group consisted of 44 eyes with preoperative normal corneal topography. Eighty-eight eyes were submitted to the photorefractive keratectomy process using the Summit Apex plus Excimer Laser. Corneal topographies were accessed by the EyeSys Analysis system; the topographic abnormalities which were considered are the following: apex displacement above 1.5D (AD), asphericity above 0.25D/mm (AS), obliquity above 15 degrees (OB), inferior-superior asymmetry equal to or more than 1.5D (IS), curvature above 47D (CU) and two combined features (CB). Main measured outcome: loss of one or more lines were safety defined for the prognosis. RESULTS: All patients were followed up during 6 months. A significant loss of BCVA occurred in PRK-AD (p<0.001) and PRK-CO (p<0.05). CONCLUSION: These data suggest that patients, who wish to be submitted to the refractive surgery must undergo preoperative corneal topography analysis and if any topographic abnormality is found in these patients, this can indicate the loss of lines of corrected vision after surgery.