Spatially selective and quantum-statistics-limited light stimulus for retina biometrics and pupillometry

Margaritakis, A.; Anyfantaki, G.; Mouloudakis, K.; Gratsea, Aikaterini; Kominis, I. K.

doi:10.1007/s00340-020-07438-z

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…In addition to the AMD related applications, structured light stimuli also enable several interesting physics applications in the rising field of quantum vision (Loulakis et al, 2017 ; Margaritakis et al, 2020 ; Gassab et al, 2023 ). Sarenac et al ( 2022 ) tested the ability of human observers to discriminate distinct profiles of spatially dependant geometric phases when directly viewing stationary structured light beams.…”

Section: Future Prospectsmentioning

confidence: 99%

Structured light enhanced entoptic stimuli for vision science applications

Pushin¹,

Cory²,

Kapahi³

et al. 2023

Front. Neurosci.

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The dichroic macular pigment in the Henle fiber layer in the fovea enables humans to perceive entoptic phenomena when viewing polarized blue light. In the standard case of linearly polarized stimuli, a faint bowtie-like pattern known as the Haidinger's brush appears in the central point of fixation. As the shape and clarity of the perceived signal is directly related to the health of the macula, Haidinger's brush has been used as a diagnostic marker in studies of early stage macular degeneration and central field visual dysfunction. However, due to the weak nature of the perceived signal the perception of the Haidinger's brush has not been integrated with modern clinical methods. Recent attempts have been made to increase the strength of the perceived signal by employing structured light with spatially varying polarization profiles. Here we review the advancements with the structured light stimuli and describe the current challenges and future prospects.

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Section: Future Prospectsmentioning

confidence: 99%

Structured light enhanced entoptic stimuli for vision science applications

Pushin¹,

Cory²,

Kapahi³

et al. 2023

Front. Neurosci.

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“…Ref. 33 extended the applications to visual science which sees a growing interest in integrating human detectors with recent technological advances 34 – 38 . It was shown that humans are able to perceive and discriminate spin-orbit states through entoptic images that arise from the interaction between the 2D polarization topologies of these beams and the radially symmetric dichroic elements in the macula of the human eye 33 .…”

Section: Introductionmentioning

confidence: 99%

Human psychophysical discrimination of spatially dependant Pancharatnam–Berry phases in optical spin-orbit states

Silva

Kapahi

Cory

et al. 2022

Sci Rep

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We tested the ability of human observers to discriminate distinct profiles of spatially dependant geometric phases when directly viewing stationary structured light beams. Participants viewed polarization coupled orbital angular momentum (OAM) states, or “spin-orbit” states, in which the OAM was induced through Pancharatnam–Berry phases. The coupling between polarization and OAM in these beams manifests as spatially dependant polarization. Regions of uniform polarization are perceived as specifically oriented Haidinger’s brushes, and study participants discriminated between two spin-orbit states based on the rotational symmetry in the spatial orientations of these brushes. Participants used self-generated eye movements to prevent adaptation to the visual stimuli. After initial training, the participants were able to correctly discriminate between two spin-orbit states, differentiated by OAM $$=\pm 1$$ = ± 1 , with an average success probability of $$69\%$$ 69 % ($$S.D. = 22\%$$ S . D . = 22 % , $$p = 0.01$$ p = 0.01 ). These results support our previous observation that human observers can directly perceive spin-orbit states, and extend this finding to non-rotating beams, OAM modes induced via Pancharatnam–Berry phases, and the discrimination of states that are differentiated by OAM.

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“…Ref. [25] extended these applications to visual science which sees a growing interest in integrating human detectors with recent technological advances [26][27][28][29][30]. It was shown that humans are able to perceive and discriminate spin-orbit states through entoptic images that arise from the interaction between the 2D polarization topologies of these beams and the radially symmetric dichroic elements in the macula of the human eye [25].…”

mentioning

confidence: 99%

Human psychophysical discrimination of spatially dependant Pancharatnam-Berry phases in optical spin-orbit states

Silva¹,

Kapahi²,

Thompson³

et al. 2020

Preprint

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We tested the ability of human observers to discriminate distinct profiles of spatially dependant geometric phases when directly viewing stationary structured light beams. Participants viewed polarization coupled orbital angular momentum (OAM) states, or "spin-orbit" states, in which the OAM was induced through Pancharatnam-Berry phases. The coupling between polarization and OAM in these beams manifests as spatially dependant polarization. Regions of uniform polarization are perceived as specifically oriented Haidinger's brushes, and study participants discriminated between two spin-orbit states based on the rotational symmetry in the spatial orientations of these brushes. Participants used self-generated eye movements to prevent adaptation to the visual stimuli. After initial training, the participants were able to correctly discriminate between two spin-orbit states, differentiated by OAM = ±1, with an average success probability of 69% (S.D. = 22%, p = 0.013). These results support our previous observation that human observers can directly perceive spin-orbit states, and extend this finding to non-rotating beams, OAM modes induced via Pancharatnam-Berry phases, and the discrimination of states that are differentiated by OAM.

show abstract

Spatially selective and quantum-statistics-limited light stimulus for retina biometrics and pupillometry

Cited by 6 publications

References 41 publications

Structured light enhanced entoptic stimuli for vision science applications

Structured light enhanced entoptic stimuli for vision science applications

Human psychophysical discrimination of spatially dependant Pancharatnam–Berry phases in optical spin-orbit states

Human psychophysical discrimination of spatially dependant Pancharatnam-Berry phases in optical spin-orbit states

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