Results 131 to 140 of about 73,863 (160)
Influence of Controlled Viewing Conditions on Emmetropization to Imposed Myopic Defocus in the Chick
, 2000 What cues are used in active emmetropization to analyse retinal image defocus remain unresolved. We asked two related questions: How important is sharp vision for compensation for myopic defocus? How fixed is the end-point of emmetropization?
Katrina Schmid, Christine F Wildsoet
exaly +3 more sources
Investigative Ophthalmology and Visual Science, 2011 Purpose. Chicks emmetropize accurately to experimentally induced myopic and hyperopic defocus. The authors investigated the emmetropization response when a specific proportion of the retina was exposed to myopic defocus while the remainder was exposed to
Dennis Yan-yin Tse, Chi-Ho To
exaly +4 more sources
Effectiveness of Hyperopic Defocus, Minimal Defocus, or Myopic Defocus in Competition with a Myopiagenic Stimulus in Tree Shrew Eyes [PDF]
Investigative Ophthalmology and Visual Science, 2006 To examine the ability of hyperopic defocus, minimal defocus, and myopic defocus to compete against a myopiagenic -5-D lens in juvenile tree shrew eyes.Juvenile tree shrews (n > or = 5 per group), on a 14-hour lights-on/10-hour lights-off schedule, wore a monocular -5-D lens (a myopiagenic stimulus) over the right eye in their home cages for more than ...
Thomas Norton, John T Siegwart
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Short-Term Axial Length Changes in Myopic Eyes Induced by Defocus Spectacles for Myopia Control
Photonics, 2023 Background. This study tested short-term axial length changes with Lenstar using a simple peripheral plus-add spectacle design. Methods. The subjects for this study were current users of monofocal glasses or contact lenses, aged 18–25 years, with myopic ...
Rafael Iribarren +2 more
exaly +2 more sources
Investigative Ophthalmology and Visual Science, 2013 Purpose: To determine the effect of progressive addition lenses (PALs) and single vision lenses (SVLs) on peripheral defocus in myopic children, and to compare the effect of myopic versus hyperopic peripheral defocus on foveal myopia progression ...
David A Berntsen +2 more
exaly +2 more sources
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Choroidal Thickness and Peripheral Myopic Defocus during Orthokeratology
Optometry and Vision Science, 2015ABSTRACT Purpose To investigate whether significant thickening occurs in the human choroid in response to chronic peripheral myopic defocus during overnight orthokeratology. Methods Subjects were nine children 11 to ...
Dustin J, Gardner +2 more
openaire +2 more sources
Temporal properties of the myopic response to defocus in the guinea pig
Ophthalmic and Physiological Optics, 2013Abstract Purpose Hyperopic defocus induces myopia in all species tested and is believed to underlie the progression of human myopia. We determined the temporal properties of the effects of hyperopic defocus in a mammalian eye. Methods
Leotta, Amelia J. +3 more
openaire +2 more sources
Ophthalmic and Physiological Optics
Abstract Purpose Spectacle lenses with peripheral lenslets have shown promise for myopia control by providing peripheral myopic defocus signals. Here, we aimed to investigate the impact of prolonged exposure (>6 months) to peripheral myopic defocus on visual information processing in myopic ...
Yingying Huang, Jinhua Bao, Fang Hou
exaly +3 more sources
Abstract Purpose Spectacle lenses with peripheral lenslets have shown promise for myopia control by providing peripheral myopic defocus signals. Here, we aimed to investigate the impact of prolonged exposure (>6 months) to peripheral myopic defocus on visual information processing in myopic ...
Yingying Huang, Jinhua Bao, Fang Hou
exaly +3 more sources
Regional alterations in human choroidal thickness in response to short-term monocular hemifield myopic defocus [PDF]
Ophthalmic and Physiological Optics, 2019 Abstract Purpose To examine the regional changes in human choroidal thickness following short‐term exposure to hemifield myopic defocus using optical coherence tomography ( OCT ).
Michael J Collins +2 more
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Myopic defocus in the evening is more effective at inhibiting eye growth than defocus in the morning: Effects on rhythms in axial length and choroid thickness in chicks [PDF]
Experimental Eye Research, 2017 Animal models have shown that myopic defocus is a potent inhibitor of ocular growth: brief (1-2 h) daily periods of defocus are sufficient to counter the effects of much longer periods of hyperopic defocus, or emmetropic vision. While the variables of duration and frequency have been well-documented with regard to effect, we ask whether the efficacy of
Pearl Thai, Debora L Nickla
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