Results 131 to 140 of about 76,743 (159)
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Eye & Contact Lens: Science & Clinical Practice, 1994
We used high-frequency ultrasound B-scanning with digital signal processing for pachymetric analysis of corneal scars to help determine the optimal management strategy. Four patients were selected for this report. By an automated motor system, 12 consecutive, parallel ultrasound B-scans, each 2.5 to 3 mm wide at 0.25 mm intervals, were obtained from ...
D Z, Reinstein +4 more
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We used high-frequency ultrasound B-scanning with digital signal processing for pachymetric analysis of corneal scars to help determine the optimal management strategy. Four patients were selected for this report. By an automated motor system, 12 consecutive, parallel ultrasound B-scans, each 2.5 to 3 mm wide at 0.25 mm intervals, were obtained from ...
D Z, Reinstein +4 more
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Continuous Non-contact Corneal Pachymetry with a High Speed Reflectometer
Journal of Refractive Surgery, 1998ABSTRACT PURPOSE: We developed an instrument that permits non-contact, continuous, high speed and high precision monitoring of corneal thickness and tested the stability and reproducibility of measurements made over extended time periods and under various conditions of low surface reflectivity encountered during protracted exposure of the ...
Bohnke, M. +3 more
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Validation of Confocal Microscopy Through Focusing for Corneal Sublayer Pachymetry
Cornea, 2002To evaluate the accuracy and precision of confocal microscopy through focusing (CMTF) for corneal sublayer pachymetry.A tandem scanning confocal microscope equipped with a nonapplanating contact objective was used to perform CMTF. The accuracy of CMTF measurements was evaluated using nine custom-made calibration contact lenses (PMMA) with varying ...
Ivarsen, A.; id_orcid 0000-0003-1466-4804 +2 more
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[Corneal topography and pachymetry in normal eyes].
[Zhonghua yan ke za zhi] Chinese journal of ophthalmology, 2003To evaluate the corneal topography and pachymetry on normal eyes.The Orbscan corneal topography system was used to investigate corneal topography and pachymetry on 46 normal subjects.In normal eyes, island-shape was the most common type in the elevation topography of anterior corneal surface, followed by incomplete ridge, regular ridge, irregular ridge
Z, Liu, Y, Xie, M, Zhang
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Agreement of Corneal Thickness Measurement Using Slitlamp and Ultrasound Pachymetry
Eye & Contact Lens: Science & Clinical Practice, 2012To estimate central corneal thickness (CCT) using a slitlamp biomicroscope and analyze its agreement with ultrasonic pachymetry.Based on the clinical estimation of CCT on slitlamp examination, 133 eyes of 123 patients were assigned to 3 groups: CCT less than 500 μm, 500 to 600 μm, and greater than 600 μm.
Tushar, Agarwal +5 more
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Journal of Refractive Surgery, 2008
Purpose To compare the central corneal thickness measured by online optical coherence pachymetry (OCP) and ultrasound pachymetry in normal cornea. Methods Forty-eight right eyes of 48 consecutive patients were enrolled in this prospective study.
Jenn-Chyuan, Wang +2 more
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Purpose To compare the central corneal thickness measured by online optical coherence pachymetry (OCP) and ultrasound pachymetry in normal cornea. Methods Forty-eight right eyes of 48 consecutive patients were enrolled in this prospective study.
Jenn-Chyuan, Wang +2 more
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Continuous Measurement of Corneal Dehydration With Online Optical Coherence Pachymetry
Cornea, 2006Online optical coherence pachymetry (online OCP) allows continuous central corneal thickness measurements over time. In this study, the effect of dehydration on corneal tissue was investigated with online OCP.Twelve eyes of 11 patients were examined with online OCP, and the central corneal thickness was registered over 5 minutes after insertion of an ...
Henning, Aurich +4 more
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Corneal thickness measurements with the Orbscan Topography System and ultrasonic pachymetry
Journal of Cataract and Refractive Surgery, 1997To compare corneal thickness measurements obtained with a new instrument, the Orbscan Topography System, with those obtained with the DGH ultrasonic pachymeter and to assess the agreement and repeatability of the two devices.LSU Eye Center, New Orleans, Louisiana, USA.Measurement agreement was assessed in 51 eyes of 26 normal volunteers using both ...
V, Yaylali, S C, Kaufman, H W, Thompson
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Central corneal pachymetry and LASIK
Ophthalmology, 2000Isaac Lipshitz, Gad Dotan
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Improved ultrasound pachymetry at corneal mid-periphery
1987Surgeons performing radial keratotomies currently rely mainly on central and paracentral measurements to set blade depths since the mid-peripheral thickness is normally greater (Martola & Baum, 1968; Tomlinson, 1972). However, the occurrence of corneal irregularities and resultant perforations together with the increasing use of other forms of kerato ...
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