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Eye Dominance and Testing Order Effects in the Circularly-Oriented Macular Pigment Optical Density Measurements.

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Title: Eye Dominance and Testing Order Effects in the Circularly-Oriented Macular Pigment Optical Density Measurements.
Authors: Kulmaganbetov, Mukhit (AUTHOR), Singh, Taranjit (AUTHOR), Pushin, Dmitry (AUTHOR), Chahal, Pinki (AUTHOR), Cory, David (AUTHOR), Garrad, Davis V. (AUTHOR), Kapahi, Connor (AUTHOR), Mungalsingh, Melanie (AUTHOR), Salehi, Iman (AUTHOR), Silva, Andrew (AUTHOR), Thompson, Benjamin (AUTHOR), Wang, Zhangting (AUTHOR), Sarenac, Dusan (AUTHOR)
Source: Ophthalmic & Physiological Optics. Jul2026, Vol. 46 Issue 3, p721-727. 7p.
Subjects: Ocular dominance, Psychophysics, Sensory perception, Vision testing, Visual perception, Eye examination
Abstract: Purpose: Psychophysical discrimination of structured light (SL) stimuli may be useful in screening for various macular disorders. The circularly-oriented macular pigment optical density (coMPOD), calculated from the discrimination performance of SL-induced entoptic phenomena, may reveal a novel functional biomarker of macular health. This study investigated the potential influence of eye dominance and testing order effects on SL-based stimulus perception, factors that potentially influence the sensitivity of screening tests based on SL technology. Methods: A psychophysical task was performed where various SL-based entoptic images with multiple azimuthal fringes rotating with a specific temporal frequency were projected onto the participants' retinas (n = 28). By occluding the central areas of entoptic images, the retinal eccentricity RT of the perceivable area of the stimuli was measured. The scale parameter of the coMPOD profile (α-value) was calculated for each participant using a spatiotemporal sensitivity model that takes into account the perceptual threshold measurements of SL stimuli with varying spatial densities and temporal frequencies. Results: The mean ± SD α-values for the dominant and non-dominant eyes were 0.11° ± 0.06° and 0.11° ± 0.05°, respectively. Similarly, the values for the first and second eyes were 0.11° ± 0.05° and 0.10° ± 0.05°, respectively. The Pearson correlation coefficient between eye dominance and testing order effects was r = 0.80 (p < 0.01). The Bland–Altman plots for both factors indicated zero bias. Conclusions: The results indicated repeatable measurements for both eyes, implying minimal impact from eye dominance and testing order on SL-based stimulus perception. The results provide a foundation for future studies exploring the clinical utility of SL tools in eye health. [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: Eye Dominance and Testing Order Effects in the Circularly-Oriented Macular Pigment Optical Density Measurements.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Kulmaganbetov%2C+Mukhit%22&quot;&gt;Kulmaganbetov, Mukhit&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Singh%2C+Taranjit%22&quot;&gt;Singh, Taranjit&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Pushin%2C+Dmitry%22&quot;&gt;Pushin, Dmitry&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Chahal%2C+Pinki%22&quot;&gt;Chahal, Pinki&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Cory%2C+David%22&quot;&gt;Cory, David&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Garrad%2C+Davis+V%2E%22&quot;&gt;Garrad, Davis V.&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Kapahi%2C+Connor%22&quot;&gt;Kapahi, Connor&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Mungalsingh%2C+Melanie%22&quot;&gt;Mungalsingh, Melanie&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Salehi%2C+Iman%22&quot;&gt;Salehi, Iman&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Silva%2C+Andrew%22&quot;&gt;Silva, Andrew&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Thompson%2C+Benjamin%22&quot;&gt;Thompson, Benjamin&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Wang%2C+Zhangting%22&quot;&gt;Wang, Zhangting&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Sarenac%2C+Dusan%22&quot;&gt;Sarenac, Dusan&lt;/searchLink&gt; (AUTHOR)
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  Data: Purpose: Psychophysical discrimination of structured light (SL) stimuli may be useful in screening for various macular disorders. The circularly-oriented macular pigment optical density (coMPOD), calculated from the discrimination performance of SL-induced entoptic phenomena, may reveal a novel functional biomarker of macular health. This study investigated the potential influence of eye dominance and testing order effects on SL-based stimulus perception, factors that potentially influence the sensitivity of screening tests based on SL technology. Methods: A psychophysical task was performed where various SL-based entoptic images with multiple azimuthal fringes rotating with a specific temporal frequency were projected onto the participants&#39; retinas (n = 28). By occluding the central areas of entoptic images, the retinal eccentricity RT of the perceivable area of the stimuli was measured. The scale parameter of the coMPOD profile (α-value) was calculated for each participant using a spatiotemporal sensitivity model that takes into account the perceptual threshold measurements of SL stimuli with varying spatial densities and temporal frequencies. Results: The mean &#177; SD α-values for the dominant and non-dominant eyes were 0.11&#176; &#177; 0.06&#176; and 0.11&#176; &#177; 0.05&#176;, respectively. Similarly, the values for the first and second eyes were 0.11&#176; &#177; 0.05&#176; and 0.10&#176; &#177; 0.05&#176;, respectively. The Pearson correlation coefficient between eye dominance and testing order effects was r = 0.80 (p &lt; 0.01). The Bland–Altman plots for both factors indicated zero bias. Conclusions: The results indicated repeatable measurements for both eyes, implying minimal impact from eye dominance and testing order on SL-based stimulus perception. The results provide a foundation for future studies exploring the clinical utility of SL tools in eye health. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Ophthalmic &amp; Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder&#39;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.&lt;/i&gt; (Copyright applies to all Abstracts.)
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        Value: 10.1007/s44402-026-00092-6
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        Text: English
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    Subjects:
      – SubjectFull: Ocular dominance
        Type: general
      – SubjectFull: Psychophysics
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      – SubjectFull: Sensory perception
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      – SubjectFull: Vision testing
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      – TitleFull: Eye Dominance and Testing Order Effects in the Circularly-Oriented Macular Pigment Optical Density Measurements.
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              Text: Jul2026
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              Y: 2026
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