Results 51 to 60 of about 415,852 (378)
Common visual problems in children with disability [PDF]
, 2014 Children with disability are at a substantially higher risk of visual impairment (VI) (10.5% compared with 0.16%) but also of ocular disorders of all types, including refractive errors and strabismus.
Salt, A, Sargent, J
core +2 more sources
Journal of Optometry, 2009 Purpose: We studied the accuracy and precision of 32 objective wavefront methods for finding the amplitude of accommodation obtained in 180 eyes. Methods: Ocular accommodation was stimulated with 0.5 D steps in target vergence spanning the full range of ...
Norberto López-Gil +3 more
doaj +1 more source
Clinical commissioning of an adaptive radiotherapy platform: Results and recommendations
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Online adaptive radiotherapy platforms present a unique challenge for commissioning as guidance is lacking and specialized adaptive equipment, such as deformable phantoms, are rare. We designed a novel adaptive commissioning process consisting of end‐to‐end tests using standard clinical resources.
Kelly Kisling +5 more
wiley +1 more source
Gaze-Contingent Ocular Parallax Rendering for Virtual Reality [PDF]
ACM Trans. Graph. 39, 2, Article 10 (April 2020), 12 pages, 2019 Immersive computer graphics systems strive to generate perceptually realistic user experiences. Current-generation virtual reality (VR) displays are successful in accurately rendering many perceptually important effects, including perspective, disparity, motion parallax, and other depth cues.
arxiv +1 more source
Vision survey of the Nnamdi Azikiwe University medical students [PDF]
, 2016 Aim: To determine the ocular problems of 1st‑year preclinical medical students at the Nnamdi Azikiwe University, Nnewi Campus, Nnewi, Nigeria.Materials and Methods: All registered 1st‑year preclinical medical students were examined in October 2008 ...
Ndulue, J.K. +2 more
core +2 more sources
Statistical process control to monitor use of a web‐based autoplanning tool
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose To investigate the use of statistical process control (SPC) for quality assurance of an integrated web‐based autoplanning tool, Radiation Planning Assistant (RPA). Methods Automatically generated plans were downloaded and imported into two treatment planning systems (TPSs), RayStation and Eclipse, in which they were recalculated using ...
Hunter Mehrens +5 more
wiley +1 more source
Correcting Presbyopia with Autofocusing Liquid-Lens Eyeglasses [PDF]
arXiv, 2021 Presbyopia, an age-related ocular disorder, is characterized by the loss in the accommodative abilities of the human ocular system and afflicts more than 1.8 billion people world-wide. Conventional methods of correcting presbyopia fragment the field of vision, inherently resulting in significant vision impairment.
arxiv
Complementary Capabilities of Photoacoustic Imaging to Existing Optical Ocular Imaging Techniques [PDF]
In Diabetes and Retinopathy, pp. 1-17. Elsevier, 2020, 2020 In this chapter, we will give a brief overview of fundus photography, SLO, and OCT while discussing photoacoustic imaging potential as the next major ocular imaging modality.
arxiv +1 more source
Acceleration characteristics of human ocular accommodation
Vision Research, 2005 Position and velocity of accommodation are known to increase with stimulus magnitude, however, little is known about acceleration properties. We investigated three acceleration properties: peak acceleration, time-to-peak acceleration and total duration of acceleration to step changes in defocus.
Shrikant R. Bharadwaj, Clifton M. Schor
openaire +2 more sources
Myopia and defocus: the current understanding [PDF]
, 2011 The current theories relating to the development and progression of myopia are related to exposure of the eye to hyperopic defocus. This paper discusses these theories and the large body of recent research investigating the evidence behind them.
Day, Mhairi, Duffy, Lorraine
core +1 more source