نتایج جستجو برای: accommodation space

تعداد نتایج: 550508  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان 1390

the space now known as complete erdos space ec was introduced by paul erdos in 1940 as the closed subspace of the hilbert space ?2 consisting of all vectors such that every coordinate is in the convergent sequence {0} ? { 1 n : n ? n}. in a solution to a problem posed by lex g. oversteegen we present simple and useful topological characterizations of ec. as an application we determine the ...

2011
David Coufal

The paper introduces an EEG signals classifier for classification of vigilance level of a car driver. The classifier is based on the concept of radial implicative fuzzy system. The novel in the presented approach is accommodation of S-shaped fuzzy sets which can handle boundary regions of the relevant input space. Both structure and parameter learning of the system are referred to and correspon...

Journal: :Gut 2003
J Tack P Caenepeel H Piessevaux R Cuomo J Janssens

AIMS Impaired gastric accommodation is a major pathophysiological mechanism in functional dyspepsia. The aim of the present work was to assess a satiety drinking test in the evaluation of accommodation in health and dyspepsia. METHODS Twenty five controls and 37 severely dyspeptic patients seen at a tertiary care centre completed a dyspepsia questionnaire, and gastric emptying and gastric bar...

Journal: :The British journal of ophthalmology 2016
Toshiya Yamamoto Takahiro Hiraoka Tetsuro Oshika

AIM To compare the magnitude of apparent accommodation in pseudophakic eyes with refractive against-the-rule (ATR), with-the-rule (WTR) and minimum astigmatism. Factors associated with apparent accommodation were also examined in each group. METHODS In total, 87 pseudophakic eyes (87 patients) that underwent monofocal intraocular lens (IOL) implantation after uneventful cataract surgery were ...

2016
Ying Tang Jian Ye

Purpose: The purpose of the current study was to investigate the pathogenesis of visual fatigue in patients after implantable collamer lens (ICL) implantation based on an evaluation of accommodation function. Methods: Thirty patients (12 males and 18 females) with high myopia underwent a toric or non-toric ICL procedure. Accommodation function was tested pre-operatively and 1, 3, and 6 months p...

Journal: :Journal of anxiety disorders 2012
Annabel Futh Laura M Simonds Nadia Micali

Parental accommodation of pediatric OCD is common and is associated with negative affect in parents. Qualitative accounts of caring for a child with OCD are limited and no studies have assessed differences between mothers and fathers in accommodation, coping and distress. The current study used a mixed methods approach to understand parental accommodation, negative affect and coping. Forty-one ...

Journal: :Vision Research 1998
John A Mordi Kenneth J Ciuffreda

Although the progressive reduction in accommodative amplitude with increased age is well documented, little is known about several other aspects of static or steady-state accommodation to provide a comprehensive assessment of changes related to age and presbyopia. Static components of accommodation (tonic accommodation, depth-of-focus, slope of the stimulus/response function, and accommodative ...

2014
Anna M. Horwood Sonia S. Toor Patricia M. Riddell

BACKGROUND Although eye exercises appear to help heterophoria, convergence insufficiency, and intermittent strabismus, results can be confounded by placebo, practice, and encouragement effects. This study assessed objective changes in vergence and accommodation responses in naive young adults after a 2-week period of eye exercises under controlled conditions to determine the extent to which tre...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 1994
J C Kotulak S E Morse

We studied instrument myopia as an overall effect consisting of interactions among the observer's accommodation and resolution during instrument viewing and the manner in which the instrument is focused. Previous investigations of instrument myopia generally have been limited to only one of these variables. Our results are consistent with the dark-focus-bias theory of accommodation, which holds...

Journal: :journal of fasting and health 0
seyed hosein hoseini-yazdi department of optometry, faculty of rehabilitation, tehran university of medical sciences, tehran, iran ebrahim jafarzadehpur department of optometry, faculty of rehabilitation, tehran university of medical sciences, tehran, iran ali mirzajani department of optometry, faculty of rehabilitation, tehran university of medical sciences, tehran, iran mohsen nematy department of nutrition, faculty of medicine, mashhad university of medical sciences, mashhad, iran

purpose: there are a few researches regarding the effects of islamic fasting on visual system. the aim of this study was to investigate the effects of ramadan fasting on the amplitude of accommodation (aa), near point of convergence (npc), positive and negative fusional vergences (pfv and nfv, respectively) in visually healthy fasters. methods: aa, npc, pfv and nfv at far (6m) and near (40cm) w...

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