Results 21 to 30 of about 73,863 (160)

Myopic loss aversion revisited [PDF]

open access: yes, 2009
In this paper we reexamine several experimental papers on myopic loss aversion by analyzing individual rather than aggregate choice patterns. We find that the behavior of the majority of subjects is inconsistent with the hypothesis of myopic loss ...
Blavatskyy, Pavlo   +2 more
core   +1 more source

Visual acuity degradation under positive lens-induced myopic defocus at nominal chart contrast levels in young adults: a repeated-measures study. [PDF]

open access: yesBMJ Open Ophthalmol
Objective To quantify visual acuity (VA) degradation across nominal chart contrast levels under graded positive lens–induced myopic defocus and to determine whether corrected low myopes differ from emmetropes in ...
Sah S, Chettri S, Gautam P, Shrestha GS.
europepmc   +2 more sources

The Parameters Governing the Anti-Myopia Efficacy of Chromatically Simulated Myopic Defocus in Tree Shrews. [PDF]

open access: yesTransl Vis Sci Technol
We previously showed that exposing tree shrews (Tupaia belangeri, small diurnal mammals closely related to primates) to chromatically simulated myopic defocus (CSMD) counteracted small-cage myopia and instead induced hyperopia (approximately +4 diopters [D]).
She Z, Gawne TJ.
europepmc   +3 more sources

Efficacy of a Gas Permeable Contact Lens to Induce Peripheral Myopic Defocus [PDF]

open access: yesOptometry and Vision Science, 2015
ABSTRACT Purpose The purpose of this work was to evaluate the potential of a novel custom‐designed rigid gas permeable (RGP) contact lens to modify the relative peripheral refractive error in a sample of myopic patients. Methods
Pauné Fabré, Jaime   +5 more
openaire   +4 more sources

“Emmetropic, but not myopic human eyes distinguish positive defocus from calculated defocus in monochromatic red light”

open access: yesVision Research, 2022
Studies in animal models have provided evidence that broadband light and chromatic cues are necessary for successful emmetropization. We have studied this question in young human subjects by measuring short-term changes in axial length when they watched movies with calculated defocus (2.5D) or optically defocused movies (+2.5D) with red interference ...
Barbara, Swiatczak, Frank, Schaeffel
openaire   +2 more sources

Emmetropic, But Not Myopic Human Eyes Distinguish Positive Defocus From Calculated Blur

open access: yesInvestigative Opthalmology & Visual Science, 2021
Defocus blur imposed by positive lenses can induce hyperopia, whereas blur imposed by diffusers induces deprivation myopia. It is unclear whether the retina can distinguish between both conditions when the magnitude of blur is matched.Ten emmetropic (average 0.0 ± 0.3 diopters [D]) and 10 subjects with myopia (-2.7 ± 0.9 D; 24 ± 4 years) watched a ...
Swiatczak, Barbara, Schaeffel, Frank
openaire   +2 more sources

Spherical Soft Contact Lens Designs and Peripheral Defocus in Myopic Eyes [PDF]

open access: yesOptometry and Vision Science, 2017
ABSTRACT Purpose Peripheral retinal defocus has been implicated in myopia progression. The effect of commercially available spherical soft contact lenses (SCLs) on peripheral defocus of adult myopic eyes was investigated. Methods
Kelly E, Moore   +2 more
openaire   +2 more sources

Stimulus Requirements for the Decoding of Myopic and Hyperopic Defocus under Single and Competing Defocus Conditions in the Chicken

open access: yesInvestigative Opthalmology & Visual Science, 2005
The bidirectional nature of emmetropization, as observed in young chicks, implies that eyes are able to distinguish between myopic and hyperopic focusing errors. In the current study the spatial frequency and contrast dependence of this process were investigated in an experimental paradigm that allowed strict control over both parameters of the retinal
Sigrid, Diether, Christine F, Wildsoet
openaire   +2 more sources

Human optical axial length and defocus [PDF]

open access: yes, 2010
Purpose: To investigate the short term influence of imposed monocular defocus upon human optical axial length (the distance from anterior cornea to retinal pigment epithelium) and ocular biometrics.\ud Methods: Twenty-eight young adult subjects (14 ...
Sander, Beata   +5 more
core   +1 more source

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