The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Paulus T V M De Jong - One of the best experts on this subject based on the ideXlab platform.
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quantitative visual fields under binocular viewing conditions in primary and consecutive Divergent Strabismus
Graefes Archive for Clinical and Experimental Ophthalmology, 1999Co-Authors: Maurits V Joosse, H J Simonsz, Ellen M Van Minderhout, Paul G H Mulder, Paulus T V M De JongAbstract:· Background: Although there have been a number of studies on the size of the suppression scotoma in Divergent Strabismus, there have been no reports on the full extent (i.e. size as well as depth) of this scotoma. · Methods: Binocular static perimetry was used to measure suppression scotomas in five patients with primary Divergent Strabismus and ten patients with consecutive Divergent Strabismus. Four control subjects were also included in the study. With two modified Friedmann visual field analysers, we measured the visual field of both eyes under monocular and binocular viewing conditions. The objective angle of squint ranged from 3° to 25°. Best corrected visual acuity was at least 0.4, but mostly 1.0 in both eyes. · Results: All subjects had normal visual fields for each eye under monocular viewing conditions. In 12 of the 15 subjects, we found a large area of suppression encompassing the projection of the fixation point as well as that of the fovea in the non-fixating eye under binocular viewing conditions. In 2 of these 12 patients, one with primary and one with consecutive Divergent Strabismus, the area of suppression was located nasally to the postion of the fovea in the field of the non-fixating eye (nasal hemisuppression). In another two patients with Divergent squint combined with vertical deviation, a small fixation-point suppression scotoma was found. The depth of suppression ranged from 3 dB to 16 dB. In one subject only, no suppression was found. · Conclusions: Our findings indicate that the shape of the suppression scotoma is not related to the origin of Divergent Strabismus or to the angle of squint. Our results also indicate that the critical age for the development of suppression in Divergent squint might be up to 14 years.
Maurits V Joosse - One of the best experts on this subject based on the ideXlab platform.
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quantitative visual fields under binocular viewing conditions in primary and consecutive Divergent Strabismus
Graefes Archive for Clinical and Experimental Ophthalmology, 1999Co-Authors: Maurits V Joosse, H J Simonsz, Ellen M Van Minderhout, Paul G H Mulder, Paulus T V M De JongAbstract:· Background: Although there have been a number of studies on the size of the suppression scotoma in Divergent Strabismus, there have been no reports on the full extent (i.e. size as well as depth) of this scotoma. · Methods: Binocular static perimetry was used to measure suppression scotomas in five patients with primary Divergent Strabismus and ten patients with consecutive Divergent Strabismus. Four control subjects were also included in the study. With two modified Friedmann visual field analysers, we measured the visual field of both eyes under monocular and binocular viewing conditions. The objective angle of squint ranged from 3° to 25°. Best corrected visual acuity was at least 0.4, but mostly 1.0 in both eyes. · Results: All subjects had normal visual fields for each eye under monocular viewing conditions. In 12 of the 15 subjects, we found a large area of suppression encompassing the projection of the fixation point as well as that of the fovea in the non-fixating eye under binocular viewing conditions. In 2 of these 12 patients, one with primary and one with consecutive Divergent Strabismus, the area of suppression was located nasally to the postion of the fovea in the field of the non-fixating eye (nasal hemisuppression). In another two patients with Divergent squint combined with vertical deviation, a small fixation-point suppression scotoma was found. The depth of suppression ranged from 3 dB to 16 dB. In one subject only, no suppression was found. · Conclusions: Our findings indicate that the shape of the suppression scotoma is not related to the origin of Divergent Strabismus or to the angle of squint. Our results also indicate that the critical age for the development of suppression in Divergent squint might be up to 14 years.
Jean-paul Guillemot - One of the best experts on this subject based on the ideXlab platform.
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Binocular Interactions in the Lateral Suprasylvian Visual Area of Strabismic Cats Following Section of the Corpus Callosum
European Journal of Neuroscience, 1991Co-Authors: M. Di Stefano, Carlo Alberto Marzi, Franco Lepore, Maurice Ptito, S. Bédard, Jean-paul GuillemotAbstract:: Visually responsive neurons have been recorded in the lateral suprasylvian area (LSA) of cats raised with either a convergent or a Divergent Strabismus. In contrast to areas 17 and 18, where many studies have documented a profound loss of binocularly activated neurons following early Strabismus, in the LSA the majority of cells could still be binocularly driven. Acute or chronic section of the splenium of the corpus callosum reduced but did not abolish binocularity in the LSA. We propose that the widespread callosal connections, the large size of the receptive fields and the peculiar internal circuitry of the LSA all concur in permitting the maintenance of binocular coding in spite of early misalignment of the eyes.
Ellen M Van Minderhout - One of the best experts on this subject based on the ideXlab platform.
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quantitative visual fields under binocular viewing conditions in primary and consecutive Divergent Strabismus
Graefes Archive for Clinical and Experimental Ophthalmology, 1999Co-Authors: Maurits V Joosse, H J Simonsz, Ellen M Van Minderhout, Paul G H Mulder, Paulus T V M De JongAbstract:· Background: Although there have been a number of studies on the size of the suppression scotoma in Divergent Strabismus, there have been no reports on the full extent (i.e. size as well as depth) of this scotoma. · Methods: Binocular static perimetry was used to measure suppression scotomas in five patients with primary Divergent Strabismus and ten patients with consecutive Divergent Strabismus. Four control subjects were also included in the study. With two modified Friedmann visual field analysers, we measured the visual field of both eyes under monocular and binocular viewing conditions. The objective angle of squint ranged from 3° to 25°. Best corrected visual acuity was at least 0.4, but mostly 1.0 in both eyes. · Results: All subjects had normal visual fields for each eye under monocular viewing conditions. In 12 of the 15 subjects, we found a large area of suppression encompassing the projection of the fixation point as well as that of the fovea in the non-fixating eye under binocular viewing conditions. In 2 of these 12 patients, one with primary and one with consecutive Divergent Strabismus, the area of suppression was located nasally to the postion of the fovea in the field of the non-fixating eye (nasal hemisuppression). In another two patients with Divergent squint combined with vertical deviation, a small fixation-point suppression scotoma was found. The depth of suppression ranged from 3 dB to 16 dB. In one subject only, no suppression was found. · Conclusions: Our findings indicate that the shape of the suppression scotoma is not related to the origin of Divergent Strabismus or to the angle of squint. Our results also indicate that the critical age for the development of suppression in Divergent squint might be up to 14 years.
H J Simonsz - One of the best experts on this subject based on the ideXlab platform.
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quantitative visual fields under binocular viewing conditions in primary and consecutive Divergent Strabismus
Graefes Archive for Clinical and Experimental Ophthalmology, 1999Co-Authors: Maurits V Joosse, H J Simonsz, Ellen M Van Minderhout, Paul G H Mulder, Paulus T V M De JongAbstract:· Background: Although there have been a number of studies on the size of the suppression scotoma in Divergent Strabismus, there have been no reports on the full extent (i.e. size as well as depth) of this scotoma. · Methods: Binocular static perimetry was used to measure suppression scotomas in five patients with primary Divergent Strabismus and ten patients with consecutive Divergent Strabismus. Four control subjects were also included in the study. With two modified Friedmann visual field analysers, we measured the visual field of both eyes under monocular and binocular viewing conditions. The objective angle of squint ranged from 3° to 25°. Best corrected visual acuity was at least 0.4, but mostly 1.0 in both eyes. · Results: All subjects had normal visual fields for each eye under monocular viewing conditions. In 12 of the 15 subjects, we found a large area of suppression encompassing the projection of the fixation point as well as that of the fovea in the non-fixating eye under binocular viewing conditions. In 2 of these 12 patients, one with primary and one with consecutive Divergent Strabismus, the area of suppression was located nasally to the postion of the fovea in the field of the non-fixating eye (nasal hemisuppression). In another two patients with Divergent squint combined with vertical deviation, a small fixation-point suppression scotoma was found. The depth of suppression ranged from 3 dB to 16 dB. In one subject only, no suppression was found. · Conclusions: Our findings indicate that the shape of the suppression scotoma is not related to the origin of Divergent Strabismus or to the angle of squint. Our results also indicate that the critical age for the development of suppression in Divergent squint might be up to 14 years.