Structured light enhanced entoptic stimuli for vision science applications

Pushin, D. A.; Cory, David G.; Kapahi, Connor; Kulmaganbetov, Mukhit; Mungalsingh, Melanie; Silva, Andrew E.; Singh, Taranjit; Thompson, Benjamin

doi:10.3389/fnins.2023.1232532

Cited by 3 publications

(2 citation statements)

References 59 publications

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“…In this line of work, the researchers successfully utilized R and L polarization coupled orbital angular momentum (OAM) states with an azimuthal phase dependence to trigger the entoptic vision of the human subject in which the number of visible azimuthal fringes become proportional to the difference in the OAM values [49,50]. Utilizing OAM structured light has shown promise as humans were able to distinguish OAM states with high accuracy and it was argued that one can use such states for diagnosis of macular degeneration, as the number of observed fringes would be different between healthy and unhealthy subjects [51,52]. Although using such states is an interesting research direction to investigate entanglement sensitivity of the human visual system, challenges exist in adapting such techniques to our proposed experimental scheme.…”

Section: Discussionmentioning

confidence: 99%

Conditions on detecting tripartite entangled state in psychophysical experiments

Gassab,

Pedram,

Müstecaplıoğlu

2024

Eur. Phys. J. Plus

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This paper explores the sensitivity of the human visual system to quantum entangled light. We examine the possibility of human subjects perceiving multipartite entangled state through psychophysical experiments. Our focus begins with a bipartite entangled state to make a comparative study with the literature by taking into account additive noise for false positive on bipartite entanglement perception by humans. After that, we limit our similar investigation to a tripartite entangled state for simplicity in higher dimensions. To model the photodetection by humans, we employ the probability of seeing determined for coherently amplified photons in Fock number states, including an additive noise. Our results indicate that detecting bipartite and tripartite entanglement with the human eye is possible for a certain range of additive noise levels and visual thresholds. Finally, we discuss several alternative amplification methods. Graphical abstract

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Section: Discussionmentioning

confidence: 99%

Conditions on detecting tripartite entangled state in psychophysical experiments

Gassab,

Pedram,

Müstecaplıoğlu

2024

Eur. Phys. J. Plus

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“…This is known as Haidinger’s brush. The condition of the macula is directly related to the shape and clarity of the perceived signal [ 27 ]. The enhanced entoptic phenomenon is a visual disorder that results from the structure of the visual system itself.…”

Section: Introductionmentioning

confidence: 99%

Visual Snow Syndrome in Patient with Migraine: Case Report and Literature Review

Chojdak-Łukasiewicz,

Dziadkowiak

2024

JCM

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Visual snow syndrome (VSS) is a rarely diagnosed neurological phenomenon. It is a visual disorder characterised by the presence of numerous white, black, or translucent dots in the visual field, resembling the ‘snow’ of an analogue TV set experiencing reception interference. According to The International Classification of Headache Disorders, 3rd edition, visual snow is defined as a pattern of continuous small dots across the visual field lasting >3 months and accompanied by at least two of the following four additional symptoms: palinopsia, increased entoptic phenomena, photophobia, and nyctalopia. These complaints are not consistent with a typical migraine with visual aura and cannot be better explained by another disorder. The authors present the case of a 39-year-old woman who was diagnosed with VSS. The symptoms appeared after a migraine attack and had not alleviated. The patient reported a sensation of constant ‘TV screen snow’. A neurological examination found no signs of focal damage to the nervous system. The results of the ophthalmological examination, MRI of the brain with contrast, MRI of the eye sockets, and EEG were normal. VSS is a phenomenon that is still not fully understood, different from migraine aura and associated with a number of additional symptoms. VSS is very difficult to treat. In this case, a lot of drugs were used without improvement. Further research must be conducted to determine the best treatment options for these patients.

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Structured Light in Vision Science Applications

Sarenac,

Cory,

Garrad

et al. 2024

EPJ Web Conf.

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The dichroic macular pigment in the eye acts as a natural radial polarization filter and enables humans to directly perceive polarization-related entoptic phenomena. Linearly polarized blue light induces a subtle bowtie-like pattern known as Haidinger’s brush in the central point of vision. The clarity and shape of this perceived pattern are directly linked to the health of the macula, rendering Haidinger’s brush a potential diagnostic marker in research on early-stage age-related macular degeneration (AMD) and central field visual dysfunction. However, due to the faint nature of this signal, integrating the perception of Haidinger’s brush into modern clinical methods remains a challenge. Here we review some advances in techniques to increase the strength of the perceived signal by employing polarization coupled orbital angular momentum states. We successfully achieved the creation of stimuli with higher numbers of azimuthal fringes, enabling the perception and discrimination of Pancharatnam-Berry phases, measuring the visual angle of entoptic phenomena, retinal imaging using structured light, and the creation of radially varying entoptic stimuli. Our current studies are focusing on applying the structured light methods that we developed to subjects that suffer from ocular diseases such as AMD.

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Structured light enhanced entoptic stimuli for vision science applications

Cited by 3 publications

References 59 publications

Conditions on detecting tripartite entangled state in psychophysical experiments

Conditions on detecting tripartite entangled state in psychophysical experiments

Visual Snow Syndrome in Patient with Migraine: Case Report and Literature Review

Structured Light in Vision Science Applications

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