Repeatability of central corneal thickness measurement with the Pentacam HR system

• Main Authors: Ruiz Simonato Alonso, Bruno Machado Fontes, Marcelo Palis Ventura, Renato Ambrósio Jr
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Oftalmologia 2012-02-01
• Series: Revista Brasileira de Oftalmologia
• Subjects: Córnea; Topografia da córnea; Biometria; Reprodutibilidade de resultados; Técnicas de diagnostico oftamológico
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802012000100003&lng=en&tlng=en
• ISSN: 1982-8551

PURPOSE: To assess the repeatability of central corneal thickness measurement at the geometrical center (Central Corneal Thickness - CCT) given by the Pentacam High Resolution (HR) Comprehensive Eye Scanner (Oculus, Wetzlar, Germany) over time. METHODS: Prospective, single center, observational study. Two separate CCT measurements were taken by the Pentacam corneal tomography exam (CTm) 3 to 12 months apart, and compared. RESULTS: One hundred and sixteen eyes (n=116) of 62 health patients were included in this study. Average CCT in first and last visits was 541.6±37 µm and 543.6±36.9 µm respectively. Mean difference between both measurements was 9.2±6.4 µm, and there was no statistically significant difference in CCT measurement between visits, with good correlation between them (P = 0.057, r² = 0,9209). CONCLUSION: Pentacam (HR) CTm gives repeatable CCT measurements over time.