Results 21 to 30 of about 336,794 (287)

On voluntary ocular accommodation [PDF]

open access: yesPerception & Psychophysics, 1975
Young observers were challenged to induce a marked monocular accommodative response to a relatively weak accommodative stimulus by placing a-9 diopter contact lens on the eye. At first, observers could not produce the desired response, but with training, three of four subjects achieved criterion.
Robert R. Provine, Jay M. Enoch
openaire   +1 more source

A covered eye fails to follow an object moving in depth

open access: yesScientific Reports, 2021
To clearly view approaching objects, the eyes rotate inward (vergence), and the intraocular lenses focus (accommodation). Current ocular control models assume both eyes are driven by unitary vergence and unitary accommodation commands that causally ...
Arvind Chandna   +4 more
doaj   +1 more source

Seeing the future: predictive control in neural models of ocular accommodation - simulation and analysis/presentation code

open access: yes, 2021
Simulink models and code to support "Seeing the future: predictive and classical control in neural models of ocular accommodation" ; paper available on biorxiv.org: BIORXIV/2021 ...
Toby Wood (7052333)   +3 more
core   +1 more source

Ocular Accommodation, Intraocular Pressure, Development of Myopia and Glaucoma: Role of Ciliary Muscle, Choroid and Metabolism. [PDF]

open access: yesMed Hypothesis Discov Innov Ophthalmol, 2020
Ocular accommodation is not just a mechanism for altering curvature of the crystalline lens of the eye, it also enables aqueous humor outflow through the trabecular meshwork, influencing intraocular pressure (IOP).
Aggarwala KRG.
europepmc   +3 more sources

Gullstrand Intracapsular Accommodation Mechanism Revised

open access: yesPhotonics, 2022
More than a century has passed since Allvar Gullstrand proposed his so called “mechanism of intracapsular accommodation” based on the concept that the change in lens power during accommodation can be larger if the lens is modeled by two different ...
Norberto López-Gil
doaj   +1 more source

Crystalline lens imaging during accommodation with a slit-scanning tomography system: preliminary results [PDF]

open access: yesEPJ Web of Conferences, 2020
A slit-scanning tomography system previously developed in the Centre of Physics of University of Minho allows to capture images of the eye and posteriorly calculus of the biometric (thickness and curvature) and optical (wavefront aberrations) properties ...
Gomes Jessica, Franco Sandra
doaj   +1 more source

A geometric model of ocular accommodation

open access: yesVision Research, 2010
An exoteric geometric mechanics model of ocular accommodation is detailed to elucidate the main ideas of various ongoing modeling efforts. The present study derives solutions for the stretched state of the ocular lens as it might appear during accommodation by using simple geometric arguments and a volume constraint, rather than the more mathematically
Reilly, Matthew A., Ravi, Nathan
openaire   +2 more sources

Numerical modelling of ocular accommodation process [PDF]

open access: yes, 2014
The ocular accommodation mechanism, as the main apparatus in the eye responsible for maintaining required vision quality when looking at objects at various distances to the eye, is one of the most vital mechanisms of the eye.
Mohammad Pour, Hooman
core   +1 more source

Objective Amplitude of Accommodation Computed from Optical Quality Metrics Applied to Wavefront Outcomes

open access: yesJournal 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

Factors Influencing Pseudo-Accommodation—The Difference between Subjectively Reported Range of Clear Focus and Objectively Measured Accommodation Range

open access: yesVision, 2019
The key determinants of the range of clear focus in pre-presbyopes and their relative contributions to the difference between subjective range of focus and objective accommodation assessments have not been previously quantified.
Sandeep K. Dhallu   +7 more
doaj   +1 more source

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