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Corneal powers measured with a rotating Scheimpflug camera
British Journal of Ophthalmology, 2015Keratometry measures the anterior corneal curvature only. Corneal power is calculated by multiplication with the keratometric refractive index, which takes into account the average negative posterior corneal power. The aim of this study was to calculate and compare various expressions for total corneal power assessed with Scheimpflug camera techniques,
Kristian Næser +2 more
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Generic Scheimpflug Camera Model and Its Calibration
2015 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2015The Scheimpflug condition is performed by tilting the lens such that the object plane, the lens plane and the image plane intersect in a common line. In this paper, two parameters are added to express the homography of the perpendicular plane and the tilted plane. Its decomposition is integrated into the generic Scheimpflug camera model.
Xu Zhang, Tao Zhou
exaly +2 more sources
Lens density measurement with Scheimpflug camera in vitrectomised eyes
Archivos de la Sociedad Española de Oftalmología (English Edition), 2016To determine whether vitrectomised eyes have a higher lens optical density, when measured with a Scheimpflug camera, compared to non-vitrectomised eyes.The peak and linear Scheimpflug optical density (DOS), and area of both eyes were measured in a sample size of 81 vitrectomised phakic patients.
M A, Ibáñez-Ruiz +2 more
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Anterior segment parameters of rabbits with rotating Scheimpflug camera
Veterinary Ophthalmology, 2014AbstractBackgroundRabbit is one of the most commonly used experimental animals for corneal studies due to similarity of size to human cornea and ease of manipulation. In this study, we assessed anterior segment parameters of the healthy rabbit eyes with Pentacam HR (Oculus, Wetzlar, Germany).MethodsSix‐month‐old, approximately 2.5–3 kg weighted, 30 ...
Harun, Yüksel +8 more
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Scheimpflug Camera-Based Systems
2019The Scheimpflug principles enable the capture of focused images of objects that are not parallel to the camera and lens, such as a curved cornea. This is achieved by careful movement of the image and lens planes. In the Pentacam, this is achieved by rotation around a central axis and capture of 50 meridional pictures.
Melanie Corbett +3 more
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Scheimpflug Camera Calibration Using Lens Distortion Model
2016Scheimpflug principle requires that the image sensor, lens, and object planes intersect at a single line known as “Scheimpflug line.” This principle has been employed in several applications to increase the depth of field needed for accurate dimensional measures.
Fasogbon, Peter +2 more
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Assessment of capsular block syndrome with Scheimpflug camera
Canadian Journal of Ophthalmology, 2009[Abstract not Available]
Kamış, Ümit +4 more
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Self-calibration of Scheimpflug cameras: an easy protocol
Measurement Science and Technology, 2007The problem of the self-calibration of Scheimpflug cameras is addressed. The approach aims to calibrate by handpositioning a roughly-known calibration pattern, thanks to a bundle adjustment technique. The purpose of this paper is to design an easy protocol accordingly.
H Louhichi +3 more
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Evaluating Cataract Development with the Scheimpflug Camera
1990Documentation of pathologic findings in the lens over a prolonged period is rather difficult. Until recently, only written reports or drawings of the process have been employed. Photography with the slit-lamp microscope has not been effective because of the insufficient depth of field and the poor reproduction capacity of instrumental parameters ...
Otto Hockwin +2 more
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