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Binocular visual function and fixational control in patients with macular disease: A review.

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Title: Binocular visual function and fixational control in patients with macular disease: A review.
Authors: Sverdlichenko, Irina (AUTHOR), Mandelcorn, Mark S (AUTHOR), Issashar Leibovitzh, Galia (AUTHOR), Mandelcorn, Efrem D (AUTHOR), Markowitz, Samuel N (AUTHOR), Tarita‐Nistor, Luminita (AUTHOR)
Source: Ophthalmic & Physiological Optics. Mar2022, Vol. 42 Issue 2, p258-271. 14p. 1 Color Photograph, 5 Charts, 3 Graphs.
Subjects: Vision, Eye movements, Vision disorders, Disease management, Binocular vision
Abstract: For normally sighted observers, the centre of the macula—the fovea—provides the sharpest vision and serves as the reference point for the oculomotor system. Typically, healthy observers have precise oculomotor control and binocular visual performance that is superior to monocular performance. These functions are disturbed in patients with macular disease who lose foveal vision. An adaptation to central vision loss is the development of a preferred retinal locus (PRL) in the functional eccentric retina, which is determined with a fixation task during monocular viewing. Macular disease often affects the two eyes unequally, but its impact on binocular function and fixational control is poorly understood. Given that patients' natural viewing condition is binocular, the aim of this article was to review current research on binocular visual function and fixational oculomotor control in macular disease. Our findings reveal that there is no overall binocular gain across a range of visual functions, although clear evidence exists for subgroups of patients who exhibit binocular summation or binocular inhibition, depending on the clinical characteristics of their two eyes. The monocular PRL of the better eye has different characteristics from that of the worse eye, but during binocular viewing the PRL of the better eye drives fixational control and may serve as the new reference position for the oculomotor system. We conclude that evaluating binocular function in patients with macular disease reveals important clinical aspects that otherwise cannot be determined solely from examining monocular functions, and can lead to better disease management and interventions. [ABSTRACT FROM AUTHOR]
Copyright of Ophthalmic & Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Binocular visual function and fixational control in patients with macular disease: A review.
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  Data: <searchLink fieldCode="AR" term="%22Sverdlichenko%2C+Irina%22">Sverdlichenko, Irina</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mandelcorn%2C+Mark+S%22">Mandelcorn, Mark S</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Issashar+Leibovitzh%2C+Galia%22">Issashar Leibovitzh, Galia</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mandelcorn%2C+Efrem+D%22">Mandelcorn, Efrem D</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Markowitz%2C+Samuel+N%22">Markowitz, Samuel N</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tarita‐Nistor%2C+Luminita%22">Tarita‐Nistor, Luminita</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ophthalmic+%26+Physiological+Optics%22">Ophthalmic & Physiological Optics</searchLink>. Mar2022, Vol. 42 Issue 2, p258-271. 14p. 1 Color Photograph, 5 Charts, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Vision%22">Vision</searchLink><br /><searchLink fieldCode="DE" term="%22Eye+movements%22">Eye movements</searchLink><br /><searchLink fieldCode="DE" term="%22Vision+disorders%22">Vision disorders</searchLink><br /><searchLink fieldCode="DE" term="%22Disease+management%22">Disease management</searchLink><br /><searchLink fieldCode="DE" term="%22Binocular+vision%22">Binocular vision</searchLink>
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  Data: For normally sighted observers, the centre of the macula—the fovea—provides the sharpest vision and serves as the reference point for the oculomotor system. Typically, healthy observers have precise oculomotor control and binocular visual performance that is superior to monocular performance. These functions are disturbed in patients with macular disease who lose foveal vision. An adaptation to central vision loss is the development of a preferred retinal locus (PRL) in the functional eccentric retina, which is determined with a fixation task during monocular viewing. Macular disease often affects the two eyes unequally, but its impact on binocular function and fixational control is poorly understood. Given that patients' natural viewing condition is binocular, the aim of this article was to review current research on binocular visual function and fixational oculomotor control in macular disease. Our findings reveal that there is no overall binocular gain across a range of visual functions, although clear evidence exists for subgroups of patients who exhibit binocular summation or binocular inhibition, depending on the clinical characteristics of their two eyes. The monocular PRL of the better eye has different characteristics from that of the worse eye, but during binocular viewing the PRL of the better eye drives fixational control and may serve as the new reference position for the oculomotor system. We conclude that evaluating binocular function in patients with macular disease reveals important clinical aspects that otherwise cannot be determined solely from examining monocular functions, and can lead to better disease management and interventions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Ophthalmic & Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Mar2022
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