Results 141 to 150 of about 2,262 (162)

Intraocular lens power calculation with the Scheimpflug camera after refractive surgery

Journal of Cataract and Refractive Surgery, 2013
The Km is calculated using the keratometric index(1.3375) to simulate standard keratometry. This index,although commonly used, is no longer valid oncecorneal refractive surgery disrupts the physiologicalratiobetweentheanteriorandposteriorcornealcurva-tures.Thehighertheamountofmyopiccorrection,thelower this index should be to avoid erroneous ...
Giacomo, Savini, Pietro, Ducoli, Kenneth J, Hoffer   +2 more
openaire   +2 more sources

Camera Self-calibration in Scheimpflug Condition for Air Flow Investigation

2006
Camera calibration is a necessary preliminary step to ensure high quality measurement in a section of a flow. The bundle adjustment technique is based on redundancy resulting from multi-viewing the calibration target. In this paper we proposed a well-adapted protocol for self-calibrating a Scheimpflug model.
Hanene Louhichi, Thierry Fournel, Jean-Marc Lavest, Habib Ben Aissia   +3 more
openaire   +1 more source

International values of corneal elevation in normal subjects by rotating Scheimpflug camera

Journal of Cataract and Refractive Surgery, 2011
To examine whether clinically significant differences exist in corneal elevation data from a sampling of countries worldwide.International multicenter.Evaluation of diagnostic test or technology.One randomly selected eye of normal adults from 8 countries spanning 6 continents was examined using the Pentacam Eye Scanner.
Matthew T, Feng, Michael W, Belin, Renato, Ambrósio, Satinder P S, Grewal, Wang, Yan, Mohamed Shafik, Shaheen, Charlotte A, Jordon, Charles, McGhee, Naoyuki, Maeda, Tobias H, Neuhann, H Burkhard, Dick, Andreas, Steinmueller   +11 more
openaire   +2 more sources

Riemannian Manifold Approach to Scheimpflug Camera Calibration for Embedded Laser-Camera Application

2017
Proceedings of the OAGM & ARW Joint Workshop Vision, Automation and ...
Tan, Xiaoying, Wieser, Volkmar, Lustig, Stefan, Moser, Bernhard A.   +3 more
openaire   +1 more source

Quantitative Scheimpflug camera study of the lens density in healthy Turkish population

International Ophthalmology, 2016
The purpose of this study is to evaluate the association between the age and the density of anterior, posterior, and nuclear parts of lens and detect the normal lens density (LD) values in different age groups. 370 eyes of 370 voluntary healthy Turkish subjects were included. These were divided in four groups according to their age. These were Group 1 (
Taner, Kar, Yakup, Aksoy, Yıldıray, Yıldırım, Abdullah, Kaya, Ali, Ayata, Melih Hamdi, Ünal   +5 more
openaire   +2 more sources

Self-Calibration of PIV Video-Cameras in Scheimpflug Condition

2004
In order to introduce more flexibility in calibration, the bundle adjustment approach is introduced for Stereo PIV systems in Scheimpflug condition. The calibration target is positionned by hand front of the video-cameras at different locations in space.
T. Fournel, J.-M. Lavest, S. Coudert, F. Collange   +3 more
openaire   +1 more source

Minimum views required to characterize cataracts when using the Scheimpflug camera

Graefe's Archive for Clinical and Experimental Ophthalmology, 1993
We performed Scheimpflug slit lamp photography and computerized image analysis on 20 normal and 25 cataractous lenses using 18 slit images for each lens taken 10 degrees apart. The data gathered from the normals served as the reference to estimate the accuracy of representation of the cataracts by the least number of views (18 and less) using a Fourier
K, Kashima, M, Unser, M B, Datiles, B L, Trus, P A, Edwards   +4 more
openaire   +2 more sources

In vivo human corneal deformation analysis with a Scheimpflug camera, a critical review

Journal of Biophotonics, 2016
Corneal morphological analysis has greatly improved in recent years, providing physicians with new and reliable parameters to study. Moreover, today corneal functional too is a routine analysis, thanks to biomechanical evaluation allowed by an ocular response analyzer (Reichert Ophthalmic Instrument, Depew, NY, USA). Corvis ST (OCULUS Optikgeräte GmbH,
LANZA, Michele, Stefania Iaccarino, BIFANI SCONOCCHIA, Mario   +2 more
openaire   +3 more sources

[Measurement of lens density with a Scheimpflug camera in diabetic patients].

Archivos de la Sociedad Espanola de Oftalmologia, 2007
To assess if diabetes, in patients without cataracts or diabetic retinopathy, alters the densitometric values of the lens and to what degree this occurs.A total of 93 patients, divided into two groups, were studied: the diabetic patients had a visual acuity equal to or greater than 0.8 and normal eye funduscopy, and the control group consisted of ...
P, Beneyto, M, Ibáñez, M A, Leal, A, García, M, Cabezas, P, Morente   +5 more
openaire   +1 more source

Evaluation of Corneal Pachymetry Measurements by Galilei Dual Scheimpflug Camera

European Journal of Ophthalmology, 2012
Farid Karimian, Sepehr Feizi, Amir Faramarzi   +2 more
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