نتایج جستجو برای: accommodation theory

تعداد نتایج: 835522  

2012
Marco Ruggeri Stephen R. Uhlhorn Carolina De Freitas Arthur Ho Fabrice Manns Jean-Marie Parel

An optical switch was implemented in the reference arm of an extended depth SD-OCT system to sequentially acquire OCT images at different depths into the eye ranging from the cornea to the retina. A custom-made accommodation module was coupled with the delivery of the OCT system to provide controlled step stimuli of accommodation and disaccommodation that preserve ocular alignment. The changes ...

Journal: :Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians 2009
S Plainis E Plevridi I G Pallikaris

PURPOSE To compare the ocular wavefront aberration between pharmacologically- and stimulus-driven accommodation in phakic eyes of young subjects. METHODS The aberration structure of the tested eye when accommodating was measured using the Complete Ophthalmic Analysis System (COAS; AMO WaveFront Sciences, Albuquerque, NM, USA). It was used in conjunction with a purposely-modified Badal optomet...

2015
Olalekan A. Oduntan

http://www.avehjournal.org doi:10.4102/aveh.v74i1.28 Accommodation is the process by which the human eye changes its focus to see objects at varying distances from the eye. For nearly 300 years, scientists have investigated and presented various views on the mechanism of accommodation. The purpose of this review is to present both the historical and contemporary theories that underpin the proce...

Journal: :Cyberpsychology & behavior : the impact of the Internet, multimedia and virtual reality on behavior and society 2004
Brian Schowengerdt Eric J. Seibel

Under natural viewing conditions, viewers do not just passively perceive. Instead, they dynamically scan the visual scene by shifting their eye fixation and focus between objects at different viewing distances. In doing so, the oculomotor processes of accommodation (eye focus) and vergence (angle between lines of sight of two eyes) must be shifted synchronously to place new objects in sharp foc...

1999
John H. Lee Lawrence R. Stark Sara Cohen Philip B. Kruger

The eye's longitudinal chromatic aberration (LCA) is known to drive `reflex' accommodation to moving objects, but the evidence is not as clear for stationary objects. The present study examined whether accommodation can be driven by static simulations of the effects of defocus and LCA. Accommodation was recorded continuously while each of 12 subjects viewed images (through a 0.75 mm pinhole) th...

Journal: :Vision research 1987
D Troilo J Wallman

Evidence is presented for an active corneal component of accommodation in chicks. Using anesthetized chicks, consistent increases in corneal curvature were observed during accommodation produced either by electrical stimulation of the Edinger-Westphal nucleus or by topical application of 0.4% nicotine sulfate to the cornea. Electrical stimulation produced a mean accommodative amplitude of 9.2 d...

Journal: :Japanese journal of ophthalmology 1997
S Konno K Ohtsuka

The results of our previous studies suggest that the rostral superior colliculus (SC) is involved in the control of accommodation in the cat. The accommodation-related area in the rostral SC projects into the pretectum and the mesencephalic reticular formation (MRF), indicating that these areas may also be involved in the control of accommodation. In this study, we tried to identify cat midbrai...

2018
René Kreichauf

In the aftermath of large refugee arrivals in 2015, EU regulations and national asylum laws were tightened, especially those regarding reception and accommodation. The current contribution introduces the concept of "campization" to explain the impact of law and policy changes on the socio-spatial configuration and functions of refugee accommodation in European capital regions. Based on qualitat...

Journal: :Journal of homosexuality 2005
Stanley O Gaines Michael C Henderson Mary Kim Samuel Gilstrap Jennifer Yi Caryl E Rusbult Deletha P Hardin Lowell Gaertner

In the present study, we examined the impact of cultural value orientations (i.e., the personally oriented value of individualism, and the socially oriented values of collectivism, familism, romanticism, and spiritualism) on accommodation (i.e., voice and loyalty, rather than exit and neglect, responses to partners' anger or criticism) in heterosexual and gay relationships; and we examined the ...

2005
A. Laaksonen T. Vesala M. Kulmala P. M. Winkler P. E. Wagner

The mass accommodation coefficient of water is a quantity for which different experimental techniques have yielded conflicting values in the range 0.04–1. From the viewpoint of cloud modelling, this is an unfortunate situation, since the value of the mass accommodation coefficient affects the model results, e.g. the number concentration of activated cloud droplets. In this commentary we note th...

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