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Literature DB >> 12153104

Simultaneous measurement of foveal spectral reflectance and cone-photoreceptor directionality.

Niels P A Zagers¹, Jan van de Kraats, Tos T J M Berendschot, Dirk van Norren.

Abstract

An instrument for simultaneous measurement of foveal spectral reflectance and cone-photoreceptor directionality is described. The key element is an imaging spectrograph (spectral range of 420-790 nm) with its entrance slit conjugate to the pupil plane of a human eye. A 1.9-deg spot on the retina is sampled in 1 s. Video observation of the retina and the pupil facilitates proper alignment. Measurements were performed on 21 healthy subjects. Model analysis of the spectra provided densities of photostable ocular absorbers. As an example, macular pigment and melanin are discussed in more detail. Spatial profiles exhibited the optical Stiles-Crawford effect, reflecting cone-photoreceptor directionality.

Entities: Species

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Year: 2002 PMID： 12153104 DOI： 10.1364/ao.41.004686

Source DB: PubMed Journal: Appl Opt ISSN： 1559-128X Impact factor: 1.980

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Cited

8 in total

1. Integrity of foveal cones in multiple evanescent white dot syndrome assessed with OCT and foveal reflection analyser.

Authors: M J Kanis; D van Norren
Journal: Br J Ophthalmol Date: 2006-02-07 Impact factor: 4.638

Review 2. Measuring macular pigment optical density in vivo: a review of techniques.

Authors: Olivia Howells; Frank Eperjesi; Hannah Bartlett
Journal: Graefes Arch Clin Exp Ophthalmol Date: 2011-01-08 Impact factor: 3.117

3. Short- and mid-term repeatability of macular pigment optical density measurements using spectral fundus reflectance.

Authors: Nikolaus Dragostinoff; René Marcel Werkmeister; Semira Kaya; Günther Weigert; Berthold Pemp; Stefan Sacu; Gerhard Garhöfer; Ursula Schmidt-Erfurth; Leopold Schmetterer
Journal: Graefes Arch Clin Exp Ophthalmol Date: 2012-02-25 Impact factor: 3.117

Simultaneous measurement of foveal spectral reflectance and cone-photoreceptor directionality.

1. Integrity of foveal cones in multiple evanescent white dot syndrome assessed with OCT and foveal reflection analyser.

Review 2. Measuring macular pigment optical density in vivo: a review of techniques.

3. Short- and mid-term repeatability of macular pigment optical density measurements using spectral fundus reflectance.

4. Adaptive optics without altering visual perception.

5. Nonmydriatic fluorescence-based quantitative imaging of human macular pigment distributions.

6. Measuring directionality of the retinal reflection with a Shack-Hartmann wavefront sensor.

7. Determination of foveal location using scanning laser polarimetry.

8. Measuring retinal contributions to the optical Stiles-Crawford effect with optical coherence tomography.