Results 171 to 180 of about 415,852 (378)

Wavefront sensing: A breakthrough for objective evaluation of dynamic accommodation in accommodative dysfunctions [PDF]

The purpose of this study was to use wavefront sensing as an objective method to detect and assess dynamic accommodation in subjects with accommodative dysfunctions and symptoms related to near-vision tasks.
Franco, Sandra, Gomes, Jessica
core   +1 more source

Ultrasound biomicroscopy insights: Ciliary body changes during accommodation in young adults

The Pan-American Journal of Ophthalmology
Purpose: The purpose of the study was to evaluate changes in the ciliary body area (CBA) at rest and during accommodation in young patients, as measured by ultrabiomicroscopy (UBM).
Carlos Eduardo Rios-Elizondo, Ana Patricia Bustamante-Vargas, Nallely Ramos-Betancourt, Catalina Becerra-Revollo, Mariana Mayorquín-Ruiz   +4 more
doaj   +1 more source

Modelling of a double‐scattering proton therapy nozzle using the FLUKA Monte Carlo code and analysis of linear energy transfer in patients treated for prostate cancer

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background The dose‐averaged linear energy transfer (LETD) in proton therapy (PT) has in pre‐clinical studies been linked to the relative biological effectiveness (RBE) of protons. Until recently, the most common PT delivery method in prostate cancer has been double‐scattered PT, with LETD only available through dedicated Monte Carlo (MC ...
Rasmus Klitgaard, Lars Fredrik Fjæra, Camilla Hanquist Stokkevåg, Perry Johnson, Mark Artz, Nancy Price Mendenhall, Curtis Bryant, Ludvig Paul Muren   +7 more
wiley   +1 more source

A review of artificial intelligence in brachytherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Artificial intelligence (AI) has the potential to revolutionize brachytherapy's clinical workflow. This review comprehensively examines the application of AI, focusing on machine learning and deep learning, in various aspects of brachytherapy.
Jingchu Chen, Richard L. J. Qiu, Tonghe Wang, Shadab Momin, Xiaofeng Yang   +4 more
wiley   +1 more source

Imperceptible Gaze Guidance Through Ocularity in Virtual Reality [PDF]

arXiv
We introduce to VR a novel imperceptible gaze guidance technique from a recent discovery that human gaze can be attracted to a cue that contrasts from the background in its perceptually non-distinctive ocularity, defined as the relative difference between inputs to the two eyes. This cue pops out in the saliency map in the primary visual cortex without
arxiv  

Dry eye disease ranking among common reasons for seeking eye care in a large US claims database

Clinical Ophthalmology, 2019
John L Bradley,1,2 Ipek Özer Stillman,3 Irina Pivneva,4 Annie Guerin,4 Amber M Evans,5 Reza Dana6 1Naval Medical Research Unit Dayton, Vision Science Lab, Wright Patterson AFB, OH, USA; 2University of Pikeville, Kentucky College of Optometry ...
Bradley JL, Özer Stillman I, Pivneva I, Guerin A, Evans AM, Dana R   +5 more
doaj  

Impact of enhanced leaf model on dose calculation accuracy in single‐isocenter multitarget stereotactic radiosurgery treatments

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Single‐isocenter multitarget (SIMT) radiosurgery has become increasingly popular as advancement in planning and delivery systems have made this approach clinically viable. With targets varying in size and distance from isocenter, SIMT plans are highly complex with dynamic multileaf collimator (MLC) motion.
Hem Moktan, Hongyu Jiang, H. Harold Li, Kenny Guida   +3 more
wiley   +1 more source

Ocular Diseases Diagnosis in Fundus Images using a Deep Learning: Approaches, tools and Performance evaluation [PDF]

SPIE Real-Time Image Processing and Deep Learning, Apr 2019, Baltimore, Maryland, United States, 2019
Ocular pathology detection from fundus images presents an important challenge on health care. In fact, each pathology has different severity stages that may be deduced by verifying the existence of specific lesions. Each lesion is characterized by morphological features. Moreover, several lesions of different pathologies have similar features.
arxiv  

Optical and structural ocular changes during incipient presbyopia [PDF]

The primary aim of this thesis was to investigate the in vivo ocular morphological and contractile changes occurring within the accommodative apparatus prior to the onset of presbyopia, with particular reference to ciliary muscle changes with age and the
Laughton, Deborah
core   +1 more source

Evaluation of convergence, accommodation and fusional vergence in pre-presbyopes with asthenopia

African Vision and Eye Health
Background: Pre-presbyopes may suffer from ocular symptoms such as asthenopia of near work. Aim: This study aimed to evaluate near points of convergence, amplitudes of accommodation, and fusional vergence among pre-presbyopes with asthenopia symptoms ...
Saif H. Alrasheed, Saeed Aljohani
doaj   +1 more source