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Emergency department ophthalmoscopy: physician confidence and clinical practices.
CJEM
January 2025
Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada.
Objectives: Fundoscopy is crucial in the emergency department to identify or rule out serious ocular and neurological conditions. Despite its clinical importance, fundoscopy is often omitted due to the technical challenges associated with traditional direct ophthalmoscopy, particularly for non-ophthalmologists. This study examines emergency physicians' practices, confidence levels, and training related to various modalities of fundoscopy including traditional direct ophthalmoscopes, binocular indirect ophthalmoscopes, panoptic ophthalmoscopes, slit lamp fundoscopy and fundus cameras; and explores the potential role of alternative modalities, such as fundus cameras, in Canadian emergency departments.
View Article and Find Full Text PDFA machine learning method for predicting telescope cycle time applied to the Cerro Murphy Observatory.
Exp Astron (Dordr)
November 2024
Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, Warsaw, 00-716 Poland.
Telescope cycle time estimation is one of the basic issues of observational astronomy. There are not many tools that help to calulate the cycle time for multiple telescopes with multiple instruments. This work presents a new tool for determing the observation time; it was applied at the Cerro Murphy Observatory (OCM) but can be used at any other observatory.
View Article and Find Full Text PDFAssessing inter-ocular fixational eye movements throughout the lifespan.
Exp Brain Res
December 2024
Cole Eye Institute, Cleveland Clinic, Cleveland, OH, USA.
Article Synopsis
- - The study investigates how fixational eye movements (FEMs) vary among children, adolescents, and adults under different viewing conditions (binocular and monocular).
- - A total of 68 healthy participants were divided into three age groups and assessed for various metrics including fixation stability and saccade characteristics using a high-resolution video tracker.
- - Results show that younger children demonstrate more fixation instability and larger saccade amplitudes compared to adults, but factors like inter-ocular fixation stability remain consistent across age groups, suggesting their utility in diagnosing conditions like amblyopia.
Multi-line laser 3D reconstruction method based on spatial quadric surface and geometric estimation.
Sci Rep
October 2024
College of information Engineering, Southwest University of Science and Technology, Mianyang, 621000, China.
Article Synopsis
- The traditional method for 3D reconstruction using multi-line lasers relies on matching points based on binocular epipolar constraints and equations from optical planes, but it faces challenges due to distortion caused by large-angle projections of Diffractive Optical Elements (DOE).
- Distorted laser light and noise in multi-line laser systems hinder accurate extraction of laser center coordinates, making it difficult to achieve high-precision 3D data.
- To overcome these challenges, the paper proposes a new approach that uses spatial quadric surfaces and geometric estimation to enhance matching point selection and improve the accuracy of multi-line laser 3D reconstructions.
New results in stereopsis and Listing's law.
Sci Rep
September 2024
Professor Emeritus, Department of Mathematics and Statistics, University of Houston-Downtown, One Main Street, Houston, TX, 77002, USA.
Human eyes' optical components are misaligned. This study presents comprehensive geometric constructions in the binocular system, with the eye model incorporating the fovea that is displaced from the posterior pole and the lens that is tilted away from the eye's optical axis. It extends their previously considered horizontal misalignment with the vertical components.
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