A Mueller matrix model of Haidinger's brushes

Misson, Gary P.

doi:10.1046/j.1475-1313.2003.00138.x

Cited by 26 publications

(24 citation statements)

References 31 publications

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“…4) around the macula correlates with the retardance Henle-fiber bowtie pattern. [24] The axes of the bowtie pattern of the depolarization images vary about the macular, similar to the retardance images (Fig. 5).…”

Section: Discussionsupporting

confidence: 59%

Depolarization properties of the normal human fovea

et al. 2009

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Depolarization data is provided for several normal retinas. Mueller matrix images of normal human fovea were acquired with a custom imaging Mueller matrix retinal polarimeter (the GDx-MM) over a 9° field at 780nm and have been analyzed for depolarization index and the variation of degree of polarization with incident polarization state. The degree of polarization (DoP) was often above 50% and varied in complex ways as a function of the incident polarization states. The depolarization properties around the macula loosely correlated with the retardance image. High spatial frequency depolarizing structures were evident throughout the fovea.

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Section: Discussionsupporting

confidence: 59%

Depolarization properties of the normal human fovea

et al. 2009

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“…50 Moreover, it is thought that foveal birefringence contributes to Haidinger's brushes, an entoptic phenomenon involving the preferential absorption of short-wavelength light by macular pigment. [51][52][53][54] We used foveal birefringence to investigate the structure of foveal photoreceptors axons, finding a close relation in most patients between visual function and appearance of foveal polarization images.…”

Section: Discussionmentioning

confidence: 99%

Relationship between foveal birefringence and visual acuity in neovascular age-related macular degeneration

Weber

Elsner

Miura

et al. 2006

Eye

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Purpose To investigate the relationship between visual acuity and foveal birefringence in patients with neovascular age-related macular degeneration. Methods In total, 40 patients with choroidal neovascularization underwent macular imaging with scanning laser polarimetry. Bowtie patterns, typically seen in birefringence images of the macula, were evaluated and classified into three categories: (1) regular bowtie present; (2) bowtie present, but disrupted; and (3) no bowtie present. The relation of the bowtie appearance to the best-corrected logMAR visual acuities was tested (ANOVA). Results Mean visual acuity was best for the group that had regular bowties (mean logMAR ¼ 0.34) and differed statistically significantly from the disrupted bowtie group and no bowtie group (P ¼ 0.01 and 0.0007). Ages for the three groups did not differ (P ¼ 0.31). Conclusions Appearance of a regular bowtie indicates a substantially intact Henle fibre layer with the potential for good visual function, despite the presence of underlying pathology. Conversely, disruption or absence of a bowtie may indicate severe damage to the photoreceptors, consistent with the finding of poorer visual acuity.

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“…This study identifies clearly defined parallel fibrillar structures, presumed to be lamellae, within the pupillary area that cross the visual axis of the cornea with a superotemporal-inferonasal orientation of 15 -20 . Such a preferred orientation of lamellae, and therefore fibrils, may account for the observed optical anisotropy of the central cornea [25,26] which behaves like a flat retarder (retardance 0.03-0.12) with its slow axis inclined 10 -30 in a superotemporal-inferonasal direction [38,39]. X-ray scatter investigations has provided further evidence for orientation of central fibrils [40,41].…”

Section: Discussionmentioning

confidence: 99%

Human corneal stromal lamellar organisation: a polarised light study in pseudophakic eyes

Misson

Timmerman

Bryanston-Cross

2008

Journal of Modern Optics

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A novel qualitative method is presented for determining the macroscopic distribution of collagen lamellae within the central human cornea in vivo. A modified digital photo slit-lamp camera adapted for use with circular polarised light is used. 19 eyes of 10 pseudophakic subjects (with prosthetic intraocular lens implants) are involved in the experiment. Confocal elliptic/hyperbolic populations of collagen fibrils in central and intermediate corneal zones are identified in all eyes with a superotemporal-inferonasal preferred orientation. Approximate mirror symmetry is found to exist between pairs of eyes. The results demonstrate capability for detail not previously reported. The identified distribution of central collagen is consistent with the reported birefringent properties of the central cornea and is compatible with X-ray scatter findings.

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A Mueller matrix model of Haidinger's brushes

Cited by 26 publications

References 31 publications

Depolarization properties of the normal human fovea

Depolarization properties of the normal human fovea

Relationship between foveal birefringence and visual acuity in neovascular age-related macular degeneration

Human corneal stromal lamellar organisation: a polarised light study in pseudophakic eyes

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