A Bayesian observer model reveals a prior for natural daylights in hue perception
In this study, we used a Bayesian observer model to derive biases and priors in hue perception based on discrimination data for hue ensembles with varying levels of chromatic noise. Our results showed that discrimination thresholds for isoluminant stimuli with hue defined by azimuth angle in cone-opponent color space exhibited a bimodal pattern, with lowest thresholds near a non-cardinal blue-yellow axis that aligns closely with the variation of natural daylights. Perceptual biases showed zero crossings around this axis, indicating repulsion away from yellow and attraction towards blue. These biases could be explained by t...
Source: Vision Research - April 16, 2024 Category: Opthalmology Authors: Yannan Su Zhuanghua Shi Thomas Wachtler Source Type: research
Visual field asymmetries in visual word form identification
In conclusion, vertical and horizontal azimuths, location of eccentricity, contrast levels of word symbols, and monocular/binocular viewing have different effects on visual field asymmetry and cortical magnification factors.PMID:38613969 | DOI:10.1016/j.visres.2024.108413 (Source: Vision Research)
Source: Vision Research - April 13, 2024 Category: Opthalmology Authors: Li-Ting Tsai Kuo-Meng Liao Chiun-Ho Hou Yuh Jang Chien-Chung Chen Source Type: research
Visual field asymmetries in visual word form identification
In conclusion, vertical and horizontal azimuths, location of eccentricity, contrast levels of word symbols, and monocular/binocular viewing have different effects on visual field asymmetry and cortical magnification factors.PMID:38613969 | DOI:10.1016/j.visres.2024.108413 (Source: Vision Research)
Source: Vision Research - April 13, 2024 Category: Opthalmology Authors: Li-Ting Tsai Kuo-Meng Liao Chiun-Ho Hou Yuh Jang Chien-Chung Chen Source Type: research
Visual field asymmetries in visual word form identification
In conclusion, vertical and horizontal azimuths, location of eccentricity, contrast levels of word symbols, and monocular/binocular viewing have different effects on visual field asymmetry and cortical magnification factors.PMID:38613969 | DOI:10.1016/j.visres.2024.108413 (Source: Vision Research)
Source: Vision Research - April 13, 2024 Category: Opthalmology Authors: Li-Ting Tsai Kuo-Meng Liao Chiun-Ho Hou Yuh Jang Chien-Chung Chen Source Type: research
Two-photon vision - Seeing colors in infrared
Vision Res. 2024 Apr 11;220:108404. doi: 10.1016/j.visres.2024.108404. Online ahead of print.ABSTRACTThis review discusses the current state of knowledge regarding the phenomenon called two-photon vision. It involves the visual perception of pulsed infrared beams in the range of 850-1200 nm as having colors corresponding to one-half of the IR wavelengths. It is caused by two-photon absorption (TPA), which occurs when the visual photopigment interacts simultaneously with two infrared photons. The physical mechanism of TPA is described, and implications about the efficiency of the process are considered. The spectral range o...
Source: Vision Research - April 12, 2024 Category: Opthalmology Authors: Katarzyna Komar Source Type: research
Similarity in motion binds and bends judgments of aspect ratio
Vision Res. 2024 Apr 9;220:108400. doi: 10.1016/j.visres.2024.108400. Online ahead of print.ABSTRACTIt is well known that objects become grouped in perceptual organization when they share some visual feature, like a common direction of motion. Less well known is that grouping can change how people perceive a set of objects. For example, when a pair of shapes consistently share a common region of space, their aspect ratios tend to be perceived as more similar (are attracted toward each other). Conversely, when shapes are assigned to different regions in space their aspect ratios repel from each other. Here we examine whethe...
Source: Vision Research - April 11, 2024 Category: Opthalmology Authors: G örkem Er Timothy D Sweeny Source Type: research
The role of perceptual processing in the oddball effect revealed by the Thatcher illusion
Vision Res. 2024 Apr 10;220:108399. doi: 10.1016/j.visres.2024.108399. Online ahead of print.ABSTRACTWhen a novel stimulus (oddball) appears after repeated presentation of an identical stimulus, the oddball is perceived to last longer than the repeated stimuli, a phenomenon known as the oddball effect. We investigated whether the perceptual or physical differences between the repeated and oddball stimuli are more important for the oddball effect. To manipulate the perceptual difference while keeping their physical visual features constant, we used the Thatcher illusion, in which an inversion of a face hinders recognition o...
Source: Vision Research - April 11, 2024 Category: Opthalmology Authors: Akira Sarodo Kentaro Yamamoto Katsumi Watanabe Source Type: research
Similarity in motion binds and bends judgments of aspect ratio
Vision Res. 2024 Apr 9;220:108400. doi: 10.1016/j.visres.2024.108400. Online ahead of print.ABSTRACTIt is well known that objects become grouped in perceptual organization when they share some visual feature, like a common direction of motion. Less well known is that grouping can change how people perceive a set of objects. For example, when a pair of shapes consistently share a common region of space, their aspect ratios tend to be perceived as more similar (are attracted toward each other). Conversely, when shapes are assigned to different regions in space their aspect ratios repel from each other. Here we examine whethe...
Source: Vision Research - April 11, 2024 Category: Opthalmology Authors: G örkem Er Timothy D Sweeny Source Type: research
The role of perceptual processing in the oddball effect revealed by the Thatcher illusion
Vision Res. 2024 Apr 10;220:108399. doi: 10.1016/j.visres.2024.108399. Online ahead of print.ABSTRACTWhen a novel stimulus (oddball) appears after repeated presentation of an identical stimulus, the oddball is perceived to last longer than the repeated stimuli, a phenomenon known as the oddball effect. We investigated whether the perceptual or physical differences between the repeated and oddball stimuli are more important for the oddball effect. To manipulate the perceptual difference while keeping their physical visual features constant, we used the Thatcher illusion, in which an inversion of a face hinders recognition o...
Source: Vision Research - April 11, 2024 Category: Opthalmology Authors: Akira Sarodo Kentaro Yamamoto Katsumi Watanabe Source Type: research
Selective microRNA expression of exosomes from retinal pigment epithelial cells by oxidative stress
Vision Res. 2024 Apr 8;220:108388. doi: 10.1016/j.visres.2024.108388. Online ahead of print.ABSTRACTThe function of exosomal miRNAs (miRs) in retinal degeneration is largely unclear. We were aimed to investigate the functions of exosomes as well as their miRs derived from retinal pigment epithelial (RPE) cells following exposure to oxidative stress (OS). After the OS by lipopolysaccharide and rotenone on RPE cells, interleukin-1 beta (IL-1β), Interleukin-6 (IL-6), Tumor Necrosis Factor-alpha (TNF-α) were upregulated, along with the decreased mitochondrial membrane potential and upregulated oxidative damage marker 8-OH-dG...
Source: Vision Research - April 9, 2024 Category: Opthalmology Authors: Zhengyu Zhang Qinyuan Gu Lu Chen Dongqing Yuan Xunyi Gu Huiming Qian Ping Xie Qinghuai Liu Zizhong Hu Source Type: research
Selective microRNA expression of exosomes from retinal pigment epithelial cells by oxidative stress
Vision Res. 2024 Apr 8;220:108388. doi: 10.1016/j.visres.2024.108388. Online ahead of print.ABSTRACTThe function of exosomal miRNAs (miRs) in retinal degeneration is largely unclear. We were aimed to investigate the functions of exosomes as well as their miRs derived from retinal pigment epithelial (RPE) cells following exposure to oxidative stress (OS). After the OS by lipopolysaccharide and rotenone on RPE cells, interleukin-1 beta (IL-1β), Interleukin-6 (IL-6), Tumor Necrosis Factor-alpha (TNF-α) were upregulated, along with the decreased mitochondrial membrane potential and upregulated oxidative damage marker 8-OH-dG...
Source: Vision Research - April 9, 2024 Category: Opthalmology Authors: Zhengyu Zhang Qinyuan Gu Lu Chen Dongqing Yuan Xunyi Gu Huiming Qian Ping Xie Qinghuai Liu Zizhong Hu Source Type: research
Localization of multiple opsins in ocular and non-ocular tissues of deep-sea shrimps and the first evidence of co-localization in a rhabdomeric R8 cell (Caridea: Oplophoroidea)
In this study, we used immunohistochemistry to describe opsin protein localization in the retinas of four species of Oplophoroidea and non-ocular tissues of Janicella spinicauda. Our results show that Acanthephyra purpurea (Acanthephyridae) retinas possess LWS-only photoreceptors, consistent with the singular peak sensitivity previously reported. Oplophoridae retinas contain two opsin clades (LWS and MWS) consistent with dual-sensitivity. Oplophorus gracilirostris and Systellaspis debilis have LWS in the proximal rhabdom (R1-7 cells) and MWS2 localized in the distal rhabdom (R8 cell). Surprisingly, Janicella spinicauda has...
Source: Vision Research - April 6, 2024 Category: Opthalmology Authors: Tom Iwanicki Mireille Steck Heather Bracken-Grissom Megan L Porter Source Type: research
Localization of multiple opsins in ocular and non-ocular tissues of deep-sea shrimps and the first evidence of co-localization in a rhabdomeric R8 cell (Caridea: Oplophoroidea)
In this study, we used immunohistochemistry to describe opsin protein localization in the retinas of four species of Oplophoroidea and non-ocular tissues of Janicella spinicauda. Our results show that Acanthephyra purpurea (Acanthephyridae) retinas possess LWS-only photoreceptors, consistent with the singular peak sensitivity previously reported. Oplophoridae retinas contain two opsin clades (LWS and MWS) consistent with dual-sensitivity. Oplophorus gracilirostris and Systellaspis debilis have LWS in the proximal rhabdom (R1-7 cells) and MWS2 localized in the distal rhabdom (R8 cell). Surprisingly, Janicella spinicauda has...
Source: Vision Research - April 6, 2024 Category: Opthalmology Authors: Tom Iwanicki Mireille Steck Heather Bracken-Grissom Megan L Porter Source Type: research
Localization of multiple opsins in ocular and non-ocular tissues of deep-sea shrimps and the first evidence of co-localization in a rhabdomeric R8 cell (Caridea: Oplophoroidea)
In this study, we used immunohistochemistry to describe opsin protein localization in the retinas of four species of Oplophoroidea and non-ocular tissues of Janicella spinicauda. Our results show that Acanthephyra purpurea (Acanthephyridae) retinas possess LWS-only photoreceptors, consistent with the singular peak sensitivity previously reported. Oplophoridae retinas contain two opsin clades (LWS and MWS) consistent with dual-sensitivity. Oplophorus gracilirostris and Systellaspis debilis have LWS in the proximal rhabdom (R1-7 cells) and MWS2 localized in the distal rhabdom (R8 cell). Surprisingly, Janicella spinicauda has...
Source: Vision Research - April 6, 2024 Category: Opthalmology Authors: Tom Iwanicki Mireille Steck Heather Bracken-Grissom Megan L Porter Source Type: research
Localization of multiple opsins in ocular and non-ocular tissues of deep-sea shrimps and the first evidence of co-localization in a rhabdomeric R8 cell (Caridea: Oplophoroidea)
In this study, we used immunohistochemistry to describe opsin protein localization in the retinas of four species of Oplophoroidea and non-ocular tissues of Janicella spinicauda. Our results show that Acanthephyra purpurea (Acanthephyridae) retinas possess LWS-only photoreceptors, consistent with the singular peak sensitivity previously reported. Oplophoridae retinas contain two opsin clades (LWS and MWS) consistent with dual-sensitivity. Oplophorus gracilirostris and Systellaspis debilis have LWS in the proximal rhabdom (R1-7 cells) and MWS2 localized in the distal rhabdom (R8 cell). Surprisingly, Janicella spinicauda has...
Source: Vision Research - April 6, 2024 Category: Opthalmology Authors: Tom Iwanicki Mireille Steck Heather Bracken-Grissom Megan L Porter Source Type: research
