Variability in parafoveal cone mosaic in normal trichromatic individuals

Dees, Elise W.; Dubra, Alfredo; Baraas, Rigmor C.

doi:10.1364/boe.2.001351

Cited by 41 publications

(39 citation statements)

References 21 publications

(48 reference statements)

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“…4). Similar results can be seen in other data sets (Chui, Song, & Burns, 2008;Dees et al, 2011;Song et al, 2011). Those with a low cone density at 1 deg eccentricity do have a wider fovea, but a wider fovea is not associated with any structural variation or cone density at 5 deg eccentricity.…”

Section: Discussionsupporting

confidence: 87%

“…High-resolution images of the cone mosaic were obtained with the Kongsberg Adaptive Optics Ophthalmoscope II (KAOO II), an upgraded version of a previous instrument (Dees, Dubra, & Baraas, 2011). The KAOO II is a custom-built, flood-illuminated fundus adaptive optics (AO) camera with 780 nm and 840 nm superluminescent diodes (SLD; Superlum Diodes Ltd., Cork, Ireland) as light sources for the wavefront sensor and the imaging channel, respectively.…”

Section: Adaptive Optics Ophthalmoscopy Imagingmentioning

confidence: 99%

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The relationship between perifoveal achromatic, L- and M-cone acuity and retinal structure as assessed with multimodal high resolution imaging

et al. 2017

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The relationships between perifoveal measures of achromatic-, L- and M-cone acuity and retinal structure were investigated in healthy young males. Thirty-two males, aged 20-39years, with normal foveal logMAR letter acuity and no observed ocular abnormalities participated in the study. Achromatic and isolated L- and M-cone spatial acuity was measured in the dominant eye with a Sloan E letter of 90% achromatic decrement contrast or 23% increment cone contrast, respectively. Separately, the central part of the same eye was imaged with high-resolution spectral-domain optical coherence tomography (SD-OCT) and adaptive optics ophthalmoscopy (AOO). Thickness measures and cone density in the fovea and parafoveal region were not correlated with perifoveal structural measures. A significant correlation was observed between thicker retinal pigment epithelium (RPE) complex, higher cone density and better L-cone logMAR at 5deg eccentricity, but not for achromatic or M-cone logMAR. The results imply that single letter perifoveal L-cone acuity, rather than achromatic acuity, may provide a useful measure for assessing the structure-function relationship and detecting early changes in the perifoveal cone mosaic.

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Section: Discussionsupporting

confidence: 87%

Section: Adaptive Optics Ophthalmoscopy Imagingmentioning

confidence: 99%

The relationship between perifoveal achromatic, L- and M-cone acuity and retinal structure as assessed with multimodal high resolution imaging

et al. 2017

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“…At each stage there are individual differences, for example, in the properties of the optical apparatus (Norren & Vos, 1974;Wyszecki & Stiles, 1967), macular pigmentation (Bone & Sparrock, 1971;Pease, Adams, & Nuccio, 1987), the retinal photoreceptor mosaic (Curcio, Sloan, Kalina, & Hendrickson, 1990;Dees, Dubra, & Baraas, 2011), the volume of the lateral geniculate nucleus (LGN; Zvorykin, 1981), concentrations of gamma-aminobutyric acid (GABA), gamma oscillation frequencies in the primary visual cortex (Edden, Muthukumaraswamy, Freeman, & Singh, 2009;Muthukumaraswamy, Edden, Jones, Swettenham, & Singh, 2009;Yoon et al, 2010), the surface and volume of the visual cortices (Andrews, Halpern, & Purves, 1997;Klekamp, Riedel, Harper, & Kretschmann, 1991;Leuba & Kraftsik, 1994;Murphy, 1985;Stensaas, Eddington, & Dobelle, 1974), and many more.…”

Section: Individual Differences In Visionmentioning

confidence: 99%

About individual differences in vision

et al. 2017

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a b s t r a c tIn cognition, audition, and somatosensation, performance strongly correlates between different paradigms, which suggests the existence of common factors. In contrast, visual performance in seemingly very similar tasks, such as visual and bisection acuity, are hardly related, i.e., pairwise correlations between performance levels are low even though test-retest reliability is high. Here we show similar results for visual illusions. Consistent with previous findings, we found significant correlations between the illusion magnitude of the Ebbinghaus and Ponzo illusions, but this relationship was the only significant correlation out of 15 further comparisons. Similarly, we found a significant link for the Ponzo illusion with both mental imagery and cognitive disorganization. However, most other correlations between illusions and personality were not significant. The findings suggest that vision is highly specific, i.e., there is no common factor. While this proposal does not exclude strong and stable associations between certain illusions and between certain illusions and personality traits, these associations seem to be the exception rather than the rule.

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“…Although a number of methods have been used to derive these metrics [4][5][6][7][8][9][10][11][12][13][14][15], only for a few of them reliability measurements have been reported [15][16][17][18]. Previous studies [16,17,[19][20][21][22][23] showed a decrease in repeatability and an increase in measurement error as the sampling window size decreased from 64x64 µm to 25x25 µm.…”

Section: Introductionmentioning

confidence: 99%

Influence of sampling window size and orientation on parafoveal cone packing density

Lombardo

Serrao

Ducoli

et al. 2013

Biomed. Opt. Express

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Abstract:We assessed the agreement between sampling windows of different size and orientation on packing density estimates in images of the parafoveal cone mosaic acquired using a flood-illumination adaptive optics retinal camera. Horizontal and vertical oriented sampling windows of different size (320x160 µm, 160x80 µm and 80x40 µm) were selected in two retinal locations along the horizontal meridian in one eye of ten subjects. At each location, cone density tended to decline with decreasing sampling area. Although the differences in cone density estimates were not statistically significant, Bland-Altman plots showed that the agreement between cone density estimated within the different sampling window conditions was moderate. The percentage of the preferred packing arrangements of cones by Voronoi tiles was slightly affected by window size and orientation. The results illustrated the high importance of specifying the size and orientation of the sampling window used to derive cone metric estimates to facilitate comparison of different studies.

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Variability in parafoveal cone mosaic in normal trichromatic individuals

Cited by 41 publications

References 21 publications

The relationship between perifoveal achromatic, L- and M-cone acuity and retinal structure as assessed with multimodal high resolution imaging

The relationship between perifoveal achromatic, L- and M-cone acuity and retinal structure as assessed with multimodal high resolution imaging

About individual differences in vision

Influence of sampling window size and orientation on parafoveal cone packing density

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