PURPOSE The aim of this study was to determine the agreement between Pentacam HR (Scheimpflug imaging, Oculus) and Orbscan II (scanning slit topography, Bausch and Lomb) in measuring corneal parameters after photorefractive keratectomy (PRK) for hyperopia. METHODS In this prospective cross-sectional study, 38 hyperopic eyes undergoing PRK were examined before refractive surgery and 8 to 10 mo...

purpose: to evaluate the relationship between central corneal thickness (cct) and optic disc area in patients with primary open angle glaucoma (poag). methods: the study was performed on patients with poag who were being followed at johns hopkins hospital. all patients underwent thorough eye examination, optic disc imaging with the heidelberg retina tomograph ii (hrt ii), and ultrasound corneal...

Fuchs endothelial corneal dystrophy (FECD) is the most common late-onset, vision-threatening corneal dystrophy in the United States, affecting about 4% of the population. Advanced FECD involves a thickening of the cornea from stromal edema and changes in Descemet membrane. To understand the relationship between FECD and central corneal thickness (CCT), we characterized common genetic variation ...

OBJECTIVE To assess the preoperative central corneal thickness (CCT) of myopic and/or astigmatism patients presenting for refractive surgery in a tertiary hospital in Yemen. METHODS In this hospital-based cross-sectional study, 2,304 subjects aged 18-50 years with myopia and myopic astigmatism who presented to the refractive surgery unit were recruited. Data for the current study was collecte...

PURPOSE To investigate the repeatability and reproducibility of intraocular pressure (IOP) and central corneal thickness (CCT) measurements using a noncontact tono/pachymeter (NT-530P) and to assess the correlation of CCT with IOP. METHODS Forty-six eyes of healthy volunteers were measured by two examiners. Three consecutive measurements per eye were performed. Repeatability was assessed usin...

PURPOSE To evaluate the effect of an acoustic factor (AF) on the comparison of central corneal thickness (CCT) and peripheral corneal thickness (PCT) measurements with Orbscan II and Pentacam. METHODS The CCT and PCT at 1, 2, and 3 radial distances from the corneal apex were measured using Orbscan II and Pentacam in 22 right eyes of 22 healthy adults (7 men, 15 women). Three measures were obt...

PURPOSE To compare corneal thickness measurements using Pentacam (Oculus, Germany), Sirius (CSO, Italy), Galilei (Ziemer, Switzerland), and RTVue-100 OCT (Optovue Inc., USA). METHODS Sixty-six eyes of 66 healthy volunteers were enrolled. Three consecutive measurements were performed with each device. The mean value of the three measurements was used for subsequent analysis. Central corneal th...

AIM To study the various ocular anatomical and physiological parameters in presbyopia. MATERIALS AND METHODS We studied the various ocular anatomical and physiological parameters like corneal curvature (keratometry readings: K1 and K2), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT) and axial length (AL) in 100 presbyopic patients between 35 - 55 years of a...

Objective: To compare the mean changes in central corneal thickness (CCT) and corneal endothelial-cell density (CED) after removal of silicon oil (ROSO) using anterior (limbal) versus posterior (pars plana) approach in aphakic patients following successful retinal re attachment surgery. Study Design: Randomized controlled trial. Place and Duration of Study: Armed Forces Institute of Ophthalmolo...

Corneal thickness (CT) maps of the central (2-mm diameter), para-central (2 to 5-mm diameter), peripheral (5 to 6-mm diameter), and minimum (5-mm diameter) cornea were measured in normal Chinese school children aged 7 to 15 years old using Fourier-domain optical coherence tomography. Multiple regression analyses were performed to explore the effect of associated factors [age, gender, refraction...