Results 31 to 40 of about 333,652 (293)

Dynamic accommodation measurement using Purkinje reflections and machine learning

Scientific Reports, 2023
Quantifying eye movement is important for diagnosing various neurological and ocular diseases as well as AR/VR displays. We developed a simple setup for real-time dynamic gaze tracking and accommodation measurements based on Purkinje reflections, which ...
Faik Ozan Ozhan, Ugur Aygun, Afsun Sahin, Hakan Urey   +3 more
doaj   +1 more source

Measurement of Monochromatic Ocular Aberrations of Human Eyes as a Function of Accommodation by the Howland Aberroscope Technique

, 1995
Further development of the objective version of the Howland and Howland [1976] Science, 193, 580–582; (1977) Journal of the Optical Society of America, 67, 1508–1518] aberroscope technique for measuring ocular aberrations is described.
Wildsoet, Christine F., Waterworth, Michael D., Christensen, James, Atchison, David A., Collins, Michael J.   +4 more
core   +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.
Bharadwaj, Shrikant R., Schor, Clifton M.   +1 more
openaire   +2 more sources

Peer-to-Peer Accommodation Networks [PDF]

, 2017
Peer-to-Peer Accommodation Networks: Pushing the boundaries is the first book to provide an in-depth analysis of the business model of Airbnb, to discuss factors facilitating the transition of peer-to-peer networks from niche market to mainstream ...
Dolnicar, Sara
core   +1 more source

Influence of orthokeratology lenses on the state of accommodative function in children with myopia

Zaporožskij Medicinskij Žurnal, 2014
Aim. It was showed that optimal optical correction have positive effect on the accommodative apparatus of the myopic eye. Absolute and relative accommodation reserves, the nearest point of clear vision in 50 patients (100 eyes) with mild myopia was ...
T. E. Tsybulskaya
doaj   +1 more source

Does methylphenidate treatment affect functional and structural ocular parameters in patients with attention deficit hyperactivity disorder? - A prospective, one year follow-up study

Indian Journal of Ophthalmology, 2022
Purpose: Methylphenidate hydrochloride, which blocks the reuptake mechanisms of dopamine and norepinephrine, is used in attention deficit hyperactivity disorder (ADHD) treatment. Methylphenidate has many general side effects including ocular findings. In
Pınar Bingöl-Kızıltunç, Esra Yürümez, Huban Atilla   +2 more
doaj   +1 more source

Combined Wavefront-Based Refraction and Anterior Segment Optical Coherence Tomography for Dynamic Accommodation Biometry [PDF]

, 2023
Accommodation is the process by which the optical power of the eye changes in order to shift focus from far to near objects. These changes in ocular power are the result of changes to the shape of the crystalline lens due to the contraction of the ...
Durkee, Heather
core   +2 more sources

Biphasic Clinical Course of Pediatric Cytomegalovirus‐Associated Immune Thrombocytopenia: Early Poor Treatment Response but Favorable Long‐Term Outcomes

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Cytomegalovirus (CMV) is a recognized trigger of immune thrombocytopenia (ITP); however, its incidence and impact on disease course in children remain controversial. Therefore, we aimed to characterize the clinical course of pediatric patients with CMV‐associated ITP.
Oded Gilad, Ohad Atia, Osama Tanous, Dafna Brik Simon, Michal Dvori, Miriam Cohen, Tracie A. Goldberg, Efraim Bilavsky, Joanne Yacobovich, Orna Steinberg‐Shemer   +9 more
wiley   +1 more source

Statistical Model of Ocular Wavefronts With Accommodation

Investigative Ophthalmology & Visual Science
The purpose of this study was to determine the minimum number of orthonormal basis functions, applying Principal Component Analysis (PCA), to represent the most wavefront aberrations at different accommodation stages. The study also aims to generate synthetic wavefront data using these functions.Monocular wavefront data from 191 subjects (26.15 ± 5.56 ...
Mechó-García, María, Arcas-Carbonell, María, Orduna-Hospital, Elvira, Sánchez-Cano, Ana, López-Gil, Norberto, Macedo-de-Araújo, Rute J., Faria-Ribeiro, Miguel, Fernandes, Paulo, González-Méijome, José Manuel, Rozema, Jos   +9 more
openaire   +6 more sources

Exercise Capacity, Physical Activity, Fatigue, and Neurocognitive Function in Adult Survivors of Childhood Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adult survivors of childhood acute lymphoblastic leukemia (ALL) are at risk of reduced exercise capacity, decreased physical activity levels, persistent fatigue, and neurocognitive deficits. The aim was to investigate exercise capacity and physical activity levels of adult survivors of childhood ALL and their associations with ...
Laura Jess, Gustaf Glavå, Simon Skau, Hans‐Georg Kuhn, Maria Bäck, Marianne Jarfelt   +5 more
wiley   +1 more source