Results 71 to 80 of about 16,042 (270)

Prevalence of Subclinical Keratoconus Among Pediatric Egyptian Population with Astigmatism

Clinical Ophthalmology, 2020
Mohamed Karim Sidky, Dina Hosameldin Hassanein, Sherif A Eissa, Yehia M Salah, Nancy M Lotfy Department of Ophthalmology, Faculty of Medicine, Cairo University, Cairo, EgyptCorrespondence: Mohamed Karim SidkyDepartment of Ophthalmology, Faculty of ...
Sidky MK, Hassanein DH, Eissa SA, Salah YM, Lotfy NM   +4 more
doaj  

Systematic investigation of methods for multiple freeform optimization in multi-lens imaging systems

, 2018
With the development in freeform technology, it has now become more and more feasible to use freeform surfaces in real system designs. While the freeform surfaces helping optical designers achieve more and more challenging system features, the methods ...
Gross, Herbert, Liu, Chang
core   +1 more source

Variation in measuring and ophthalmic factors correlating with central corneal thickness in the Northern Finland birth cohort eye study

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, Oona Ahokas, Johanna Liinamaa, Ville Saarela   +3 more
wiley   +1 more source

Classification of Color-Coded Scheimpflug Camera Corneal Tomography Images Using Deep Learning

Translational Vision Science & Technology, 2020
Purpose To assess the use of deep learning for high-performance image classification of color-coded corneal maps obtained using a Scheimpflug camera. Methods We used a domain-specific convolutional neural network (CNN) to implement deep learning.
Hazem Abdelmotaal, Magdi M Mostafa, Ali Mostafa, A. A. Mohamed, Khaled Abdelazeem   +4 more
semanticscholar   +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
wiley   +1 more source

Comparison of biomicroscopic fluorescein tear breakup time with noninvasive tear breakup time in diabetic patients with dry eyes

The Pan-American Journal of Ophthalmology
Objectives: This study aimed to compare biomicroscopic fluorescein tear breakup time (TBUT) with noninvasive tear breakup time (NI-TBUT) using Sirius topography in diabetic patients with dry eyes.
Mayank Jhanwar, Sumit Goyal, Saurabh Kushwaha, Mohini Agrawal, V. K. B. Muthu Kamal, Arpit Srivastava   +5 more
doaj   +1 more source

Comparative analysis of peripheral corneal geometry in health and Keratoconus [PDF]

, 2017
OBJECTIVES:: To describe and compare corneal peripheral angles in normal and keratoconic eyes, to gain a better understanding of the topography of the periphery of the cornea in keratoconus and assist practitioners in the selection and fitting of large ...
Cardona Torradeflot, Genís, Gispets Parcerisas, Joan, Lupón Bas, Núria, Mas Aixalà, Enric   +3 more
core   +2 more sources

Reconstruction of deep and perforating corneal defects in dogs—A review (Part II/III): Biomaterials and keratoprosthesis

Veterinary Ophthalmology, Volume 28, Issue 2, Page 532-542, March 2025.
Abstract The surgical reconstruction of severe corneal ulcers is a common and crucial component of the clinical practice of veterinary ophthalmology. Numerous surgical techniques are used in dogs for corneal reconstruction, and these techniques may be categorized by the material used to repair the corneal lesion.
Eric C. Ledbetter, Rick F. Sanchez, Marta Leiva Repiso   +2 more
wiley   +1 more source

Scheimpflug imaging for evaluation of intraocular lens position in modified flanged scleral fixated intraocular lens

Therapeutic Advances in Ophthalmology, 2023
Background: Scleral fixation of intraocular lens (IOLs) is the most preferred technique for the management of aphakia and the techniques have evolved over the years.
Avadhesh Oli, Anil Yadav, J. Ganesh Babu, Divya Balakrishnan   +3 more
doaj   +1 more source

Accidental intralenticular dexamethasone intravitreal implant with the resolution of macular oedema in central retinal vein occlusion [PDF]

, 2016
No abstract ...
Abdolrahimzadeh, Solmaz, Plateroti, ANDREA MARIA, Plateroti, Pasquale, Scarinci, Fabio   +3 more
core   +1 more source