PURPOSE: To evaluate and compare corneal hysteresis (CH) and corneal resistance factor (CRF) in healthy eyes with a central corneal thickness (CCT) < 505 µm with CH and CRF in gender-, age-, and CCT-matched keratoconus cases, and to estimate the sensitivity and specificity of these parameters for discriminating between the two groups. METHODS: Prospective, comparative case series. In total 46 eyes from 30 healt...
A “Segurança Nacional e as Estratégias Energéticas de Portugal e Espanha” lida com um dos temas de maior relevância para a Segurança de ambos os países ibéricos: a questão da energia. O primeiro capítulo leva o leitor para o quadro internacional da energia e os riscos e as ameaças que afectam a segurança energética em termos globais e europeus. O segundo capítulo lida com as vulnerabilidades e potencialidades d...
PURPOSE: To evaluate the sensitivity, specificity, and test accuracy of corneal biomechanical metrics and anterior segment data in differentiating keratoconus from healthy corneas. METHODS: Comparative case series. Patients with and without keratoconus (gender and age-matched) were submitted for complete eye examinations including corneal hysteresis (CH) and corneal resistance factor (CRF) as measured by the Oc...
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