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PURPOSE To assess the repeatability and reproducibility of 3 rotating Scheimpflug cameras, the Pentacam (Oculus, Wetzlar, Germany), Sirius (Costruzione Strumenti Oftalmici, Florence, Italy), and Galilei (Ziemer, Biel, Switzerland), and 1 Fourier-domain optical coherence tomography (FD-OCT) system, the RTvue-100 OCT (Optovue Inc., Fremont, CA), in measuring(More)
PURPOSE To study retinal nerve fiber layer (RNFL) thickness by optical coherence tomography (StratusOCT) in patients with Leber's hereditary optic neuropathy (LHON). DESIGN Cross-sectional study. PARTICIPANTS AND/OR CONTROLS Thirty-eight patients with LHON were analyzed and compared with an age-matched control group of 75 patients. Patients with LHON(More)
PURPOSE The aim of this study was to evaluate the repeatability of central corneal thickness (CCT) measurements in normal eyes using 2 new noncontact specular microscopes (NCSMs) EM-3000 (Tomey, Japan) and SP-02 (CSO, Italy) and to compare the results with those obtained from an SP-3000P NCSM (Topcon, Japan) and ultrasound pachymetry (USP). METHODS(More)
PURPOSE To evaluate the accuracy of corneal power measurements by the Pentacam Scheimpflug system for intraocular lens (IOL) power calculation. SETTING Studio Oculistico d'Azeglio, Bologna, Italy. METHODS Consecutive patients having phacoemulsification and in-the-bag IOL implantation were prospectively studied. Intraocular lens power was calculated by(More)
BACKGROUND AND OBJECTIVE To evaluate the repeatability of optic nerve head (ONH) measurements by spectral-domain optical coherence tomography. PATIENTS AND METHODS Three scans were acquired in 32 healthy subjects during one session. Using Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA), the cup-to-disc ratio (CDR), disc area, rim area, cup volume, and(More)
BACKGROUND To evaluate the influence of axial length on measurements of the retinal nerve fibre layer (RNFL) thickness and optic nerve head (ONH) parameters in healthy subjects. METHODS Using Cirrus HD-OCT, RNFL thickness and ONH parameters (disc and rim area) were measured in 15 short (<22.5 mm), 15 medium (22.51-25.5 mm) and 15 long (>25.51 mm) eyes. (More)
PURPOSE To compare results of intraocular lens (IOL) power calculation methods after myopic excimer laser surgery. SETTING Private practice. METHODS In this prospective study, eyes having phacoemulsification after myopic excimer laser surgery were classified into Group 1 (preoperative corneal power available, refractive change known), Group 2(More)
PURPOSE To compare the anterior segment measurements provided by 3 Scheimpflug tomographers and a Placido corneal topographer. SETTING Private clinical ophthalmology practice. DESIGN Evaluation of diagnostic test or technology. METHODS In a sample of 25 consecutive patients having either refractive or cataract surgery, the anterior eye segment was(More)
PURPOSE To comprehensively assess the precision and agreement of anterior corneal power measurements using 8 different devices. METHODS Thirty-five eyes from 35 healthy subjects were included in the prospective study. In the first session, a single examiner performed on each subject randomly measurements with the RC-5000 (Tomey Corp., Japan), KR-8000(More)
BACKGROUND Parkinson disease (PD) is a neurodegenerative process that leads to a selective loss of dopaminergic neurons, mainly in the basal ganglia of the brain. Numerous studies have analyzed the ability of optical coherence tomography (OCT) to detect retinal nerve fiber layer (RNFL) thickness abnormalities and changes in PD, but the results have not(More)