Mesopic Contrast Sensitivity Functions in Amblyopic Children
نویسندگان
چکیده
منابع مشابه
Amblyopic contrast sensitivity: insensitivity to unsteady fixation.
Functional amblyopia (a typically unilateral loss of visual acuity of unknown origin) is frequently accompanied by unsteady fixation. Measurements taken under conditions of retinal-image stabilization indicate that this fixation problem does not contribute to the currently measured losses in spatial contrast sensitivity of the amblyopic eye. Indeed, retinal image motions recorded from unsteadil...
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OBJECTIVE To demonstrate differences in foveal contrast sensitivity (CS) between glaucomatous and nonglaucomatous eyes using a simple, rapid computerized test. METHODS This study included consecutive patients with glaucoma (35 eyes) and age-matched control participants (23 eyes) with visual acuity of 20/30 or better. Patients with any other ocular disease, including cataract, were excluded. A...
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Contrast detection is impaired in amblyopes. To understand the contrast processing deficit in amblyopia, we studied the effects of masking noise on contrast threshold in amblyopic macaque monkeys. Amblyopia developed as a result of either experimentally induced strabismus or anisometropia. We used random spatiotemporal broadband noise of varying contrast power to mask the detection of sinusoida...
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26 27 Human contrast sensitivity in low scotopic conditions is regulated according to 28 the deVries-Rose law. Previous cat behavioral data, as well as cat and mice 29 electrophysiological data, have not confirmed this relationship. To resolve this 30 discrepancy at the behavioral level, we compared sensitivity in dim light for cats and 31 humans in parallel experiments utilizing the same visua...
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Human psychophysical studies suggest that strabismic and anisometropic amblyopes may have characteristically different patterns of visual loss. In particular, anisometropic amblyopes often show deficits on spatial localization tasks that scale with their spatial resolution losses, whereas strabismic amblyopes can show localization deficits that are large relative to their losses in spatial reso...
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ژورنال
عنوان ژورنال: Yonsei Medical Journal
سال: 2003
ISSN: 0513-5796
DOI: 10.3349/ymj.2003.44.6.995