Results 41 to 50 of about 1,834,076 (153)
Image Analysis of Scheimpflug Negatives
Ophthalmic Research, 2009 Evaluation of various long-term studies on changes of different lens opacities, as had been rendered possible by microdensitometric image analysis of the film blackening of Scheimpflug photographs, showed that only in a few special cases an extension of the opacification to adjacent lens layers is to be expected within the observation period of 2–3 ...
Otto Hockwin, Heike Laser, Klaus Kapper
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Improvement of Scheimpflug systems with freeform surfaces
, 2022 S.1482-1491It is well known that freeform surfaces are used to improve the resolution in systems without rotational symmetry. For Scheimpflug systems, the tilted object plane leads to variant magnification in the system imaging.
Zhong, Y., Gross, H.
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American Journal of Ophthalmology Case Reports, 2022 An 81-year-old patient was referred for an intraocular lens (IOL) exchange surgery because of a presumed IOL opacification. Using diagnostic imaging techniques such as anterior segment optical coherence tomography (OCT) and Scheimpflug imaging, we ...
Tadas Naujokaitis +3 more
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Distribution of corneal densitometry in different grades of keratoconus
Indian Journal of Ophthalmology, 2023 Purpose: To evaluate the use of Scheimpflug tomography in corneal densitometry (CD) in comparing the stages of keratoconic eyes. Methods: Keratoconic (KC) corneas (stages 1–3 classified according to the topographic parameters) were examined using the ...
Amr Mounir +3 more
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Scheimpflug Records without Distortion – A Mythos? [PDF]
, 1999 The Scheimpflug principle was recommended as allowing distortion-free imaging; however, a detailed analysis reveals geometrical errors as well as distortions arising from absorption of light along the optical pathway. Correction formulas and factors will
Huebscher, Hans-Joachim +3 more
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Intraocular lens alignment from Purkinje and Scheimpflug imaging [PDF]
Clinical and Experimental Optometry, 2010 The improved designs of intraocular lenses (IOLs) implanted during cataract surgery demand understanding of the possible effects of lens misalignment on optical performance. In this review, we describe the implementation, set-up and validation of two methods to measure in vivo tilt and decentration of IOLs, one based on Purkinje imaging and the other ...
Patricia, Rosales +3 more
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The role of Scheimpflug imaging in the management of posterior scleritis
Eye and Brain, 2010 Posterior scleritis is a rare but sight-threatening ocular inflammatory disorder that can present in a number of different ways and sometimes silently. Diagnosis can be difficult, and usually is clinical, confirmed by B-mode ultrasonography. Patients can be at risk of angle-closure glaucoma in this condition, and traditional methods of angle assessment
Natalia, Pawlowska, Jonathan, Luck
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Acta Ophthalmologica, EarlyView.Abstract Purpose To assess the correlation between optical coherence tomography (OCT) and ultrasound pachymetry (USP) as methods for analysing central corneal thickness (CCT) and to evaluate ophthalmic factors affecting CCT. Methods The eyes of 3070 subjects of the Northern Finland Birth Cohort (NFBC) were examined at the age of 45–49 years.
Tuomas Qvist +3 more
wiley +1 more source
Acta Ophthalmologica, EarlyView.Abstract Purpose To evaluate the repeatability of interpolated Pentacam HR elevation, densitometry and anterior chamber depth (ACD) map data before and after customized corneal crosslinking (CXL) in keratoconus (KC) and healthy eyes with low‐grade myopia (MY), including effects of KC severity.
Anneli Fredriksson +2 more
wiley +1 more source
Reduced order modelling of air‐puff test for corneal material characterisation
Journal of Microscopy, EarlyView.Abstract Models of the fluid–structure interaction (FSI) model for the air‐puff test were analysed. Using Abaqus, the air‐puff test is applied to eyes with varying biomechanical parameters, such as material properties, corneal thickness, and radius.
Osama M. Maklad, Muting Hao
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