Results 1 to 10 of about 1,005 (146)
Wide-vergence, multi-spectral adaptive optics scanning laser ophthalmoscope with diffraction-limited illumination and collection [PDF]
Biomedical Optics Express, 2020 Visualizing and assessing the function of microscopic retinal structures in the human eye is a challenging task that has been greatly facilitated by ophthalmic adaptive optics (AO). Yet, as AO imaging systems advance in functionality by employing multiple spectral channels and larger vergence ranges, achieving optimal resolution and signal-to-noise ...
Sanam Mozaffari +4 more
+5 more sources
Multi-depth switching by triple wavefront modulation of quarter-waveplate geometric phase lenses for vergence-accommodation-matching extended reality [PDF]
Light: Science & ApplicationsWe present a novel approach to resolving the vergence–accommodation conflict (VAC) in extended reality (XR) optics by introducing a quarter-waveplate (QWP) geometric phase lens (GPL) capable of triple wavefront modulation—focusing, defocusing, and non ...
Jung-Yeop Shin +8 more
doaj +2 more sources
Vergence-accommodation conflict in optical see-through display: review and prospect
Results in Optics, 2021 The optical see-through near-eye display finds wide applications in various areas such as medical treatment, education, tourism and entertainment. However, the vergence-accommodation conflict (VAC) is an obstacle in developing the optical performance of high quality.
Jufan Zhang, Feng-Zhou Fang
exaly +3 more sources
Holographic Sampling Display Based on Metagratings
iScience, 2020 Summary: Glasses-free three-dimensional (3D) display is considered as a potential disruptive technology for display. The issue of visual fatigue, mainly caused by the inaccurate phase reconstruction in terms of image crosstalk, as well as vergence and ...
Wenqiang Wan +8 more
doaj +1 more source
Ray pencils of general divergency
African Vision and Eye Health, 2009 That a thin refracting element can have a dioptric power which is asymmetric immediately raises questions at the fundamentals of linear optics. In optometry the important concept of vergence, in particular, depends on the concept of a pencil of rays ...
W. F. Harris
doaj +1 more source
Accommodation Responds to Optical Vergence and Not Defocus Blur Alone
Investigative Opthalmology & Visual Science, 2017 To determine whether changes in wavefront spherical curvature (optical vergence) are a directional cue for accommodation.Nine subjects participated in this experiment. The accommodation response to a monochromatic target was measured continuously with a custom-made adaptive optics system while astigmatism and higher-order aberrations were corrected in ...
Antonio J. Del Águila-Carrasco +6 more
openaire +2 more sources
Fundamentals of Presbyopia: visual processing and binocularity in its transformation
Eye and Vision, 2018 Background The accommodation has considerable interactions with the pupil response, vergence response and binocularity. The transformation of visual reception processing and the changes of the binocular cooperation during the presbyopia development are ...
Olga I. Rozanova +2 more
doaj +1 more source
i-Perception, 2013 The “zograscope” is a “visual aid” (commonly known as “optical machine” in the 18th century) invented in the mid-18th century, and in general use until the early 20th century.
Jan Koenderink +2 more
doaj +1 more source
Binocular Vision in Patients with Multiple Sclerosis
Clinical Optometry, 2021 Amparo Gil-Casas,1,2 David P Piñero-Llorens,2 Ainhoa Molina-Martin2 1Clínica Optométrica, Fundació Lluís Alcanyís, University of Valencia, Valencia, Spain; 2Optics and Visual Perception Group (GOPV), Department ...
Gil-Casas A +2 more
doaj
Emmetropization in chicks uses optical vergence and relative distance cues to decode defocus
Vision Research, 2001 When visual information is confined to one object plane, the emmetropization end-point is adjusted in accord with the corresponding incident optical vergence at the eye [Proceedings of the 7th International Conference on Myopia (2000) 113]. We now report the effect of adding extra visual information beyond the target plane.
Wildsoet, Christine, Schmid, Katrina
openaire +3 more sources