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Macular pigment optical density

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https://www.readbyqxmd.com/read/28431432/contrast-sensitivity-and-lateral-inhibition-are-enhanced-with-macular-carotenoid-supplementation
#1
James M Stringham, Kevin J O'Brien, Nicole T Stringham
Purpose: Once deposited in the retina, the so-called macular carotenoids lutein (L), zeaxanthin (Z), and mesozeaxanthin (MZ) have been shown to enhance visual performance. The purpose of our study was to investigate whether increasing macular pigment optical density (MPOD) could enhance lateral inhibitory processes, and thereby improve contrast sensitivity (CS). Methods: A total of 59 young (18-25 years), healthy individuals participated in this 1-year, double-masked, placebo-controlled study...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28426871/macular-pigment-density-and-quantitative-fundus-autofluorescence-in-young-healthy-subjects
#2
Chiara M Eandi, Marco Nassisi, Carlo Lavia, Camilla Alovisi, Ugo de Sanctis
Purpose: To measure macular pigment (MP) and find possible correlation between heterochromatic flicker photometry (HFP) and quantitative autofluorescence (qAF) in young healthy subjects. Methods: We enrolled 80 eyes of 40 young healthy subjects. Macular pigment optical density (MPOD) was automatically calculated with a macular pigment screener (MPS; MPODHFP). We calculated qAF comparing gray levels (GL) of qAF images with GL of internal reference of a confocal scanning laser ophthalmoscopy...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28336284/macular-pigment-density-variation-after-supplementation-of-lutein-and-zeaxanthin-using-the-visucam-%C3%A2-200-pigment-module-impact-of-age-related-macular-degeneration-and-lens-status
#3
G Azar, M Quaranta-El Maftouhi, J-J Masella, M Mauget-Faÿsse
PURPOSE: To assess the evolution of macular pigment optical density (MPOD) following supplementation with various macular formulations obtained with the Visucam(®) 200, and to study the factors affecting MPOD measurements. MATERIALS AND METHODS: In this prospective, randomized, double-masked multicenter study, patients were divided into 2 groups: group A (patients without retinal pathology who underwent cataract surgery 1 month previously) and group B (patients with neovascular age-related macular degeneration [AMD] in one eye)...
April 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28271618/plasma-long-chain-omega-3-polyunsaturated-fatty-acids-and-macular-pigment-in-subjects-with-family-history-of-age-related-macular-degeneration-the-limpia-study
#4
Bénédicte M J Merle, Benjamin Buaud, Jean-François Korobelnik, Alain Bron, Marie-Noëlle Delyfer, Marie-Bénédicte Rougier, Hélène Savel, Carole Vaysse, Catherine Creuzot-Garcher, Cécile Delcourt
PURPOSE: In numerous epidemiological studies, omega-3 polyunsaturated fatty acids (PUFAs) have been associated with a decreased risk of age-related macular degeneration (AMD). Beyond their structural, functional and neuroprotective roles, omega-3 PUFAs may favour the retinal accumulation of lutein and zeaxanthin and thus increase macular pigment optical density (MPOD). We examined the associations of MPOD with plasma omega-3 PUFAs in subjects with family history of AMD. METHODS: The Limpia study is a double-blind, placebo-controlled, prospective randomized clinical trial performed in 120 subjects...
March 8, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28244563/non-dietary-correlates-and-determinants-of-plasma-lutein-and-zeaxanthin-concentrations-in-the-irish-population
#5
R Moran, J M Nolan, J Stack, A M O'Halloran, J Feeney, K O Akuffo, R A Kenny, S Beatty
OBJECTIVE: To investigate non-dietary correlates and determinants of plasma lutein (L) and zeaxanthin (Z) concentrations in The Irish Longitudinal Study on Ageing (TILDA) sample. DESIGN: Cross-sectional study. SETTING: Community dwelling adults in the Republic of Ireland (ROI). PARTICIPANTS: 3,681 participants aged 50 years and older. MEASUREMENTS: TILDA is a nationally representative prospective cohort study of community dwelling adults aged 50 years and over in the ROI...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28231126/macular-pigment-optical-density-and-measures-of-macular-function-test-retest-variability-cross-sectional-correlations-and-findings-from-the-zeaxanthin-pilot-study-of-response-to-supplementation-zeastress-pilot
#6
Alessandro Iannaccone, Giovannella Carboni, Gina Forma, Maria Giulia Mutolo, Barbara J Jennings
We report on the short-term test-retest baseline variability in macular function tests in ZEASTRESS-Pilot participants (n = 18), on their cross-sectional correlation with macular pigment optical density (MPOD), and on the effects of four months (FUV4) of 20 mg/day zeaxanthin (ZX), followed by a four-month washout (FUV8; n = 24, age 50-81 years old). Outcomes included: MPOD at 0.5 and 2.0 deg eccentricity (MPOD-0.5 and -2.0); contrast sensitivity (CS); pattern-reversal electroretinogram (PERG) amplitude; dark-adapted 650 nm foveal cone sensitivity (DA650-FCS); and 500 mn parafoveal rod sensitivity (DA500-PFRS)...
April 29, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28198205/supplementation-with-macular-carotenoids-reduces-psychological-stress-serum-cortisol-and-sub-optimal-symptoms-of-physical-and-emotional-health-in-young-adults
#7
Nicole Tressa Stringham, Philip V Holmes, James M Stringham
PURPOSE: Oxidative stress and systemic inflammation are the root cause of several deleterious effects of chronic psychological stress. We hypothesize that the antioxidant and anti-inflammatory capabilities of the macular carotenoids (MCs) lutein, zeaxanthin, and meso-zeaxanthin could, via daily supplementation, provide a dietary means of benefit. METHODS: A total of 59 young healthy subjects participated in a 12-month, double-blind, placebo-controlled trial to evaluate the effects of MC supplementation on blood cortisol, psychological stress ratings, behavioural measures of mood, and symptoms of sub-optimal health...
February 15, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28068388/the-association-between-foveal-morphology-and-macular-pigment-spatial-distribution-an-ethnicity-study
#8
Irene Ctori, Byki Huntjens
PURPOSE: Macular pigment (MP) spatial distribution varies considerably among individuals. We investigated ethnic variations in MP spatial distribution in relation to foveal architecture. METHODS: We measured MP optical density (MPOD) using heterochromatic flicker photometry (MAP test, City, University of London) in 76 white, 80 South Asian and 70 black volunteers (18 to 39 years). MPOD spatial profiles were classified objectively as exponential, ring-like or central dip, based on deviations away from an exponential fit...
2017: PloS One
https://www.readbyqxmd.com/read/27959968/enhanced-visualization-of-subtle-outer-retinal-pathology-by-en-face-optical-coherence-tomography-and-correlation-with-multi-modal-imaging
#9
Danuta M Sampson, David Alonso-Caneiro, Avenell L Chew, Tina Lamey, Terri McLaren, John De Roach, Fred K Chen
PURPOSE: To present en face optical coherence tomography (OCT) images generated by graph-search theory algorithm-based custom software and examine correlation with other imaging modalities. METHODS: En face OCT images derived from high density OCT volumetric scans of 3 healthy subjects and 4 patients using a custom algorithm (graph-search theory) and commercial software (Heidelberg Eye Explorer software (Heidelberg Engineering)) were compared and correlated with near infrared reflectance, fundus autofluorescence, adaptive optics flood-illumination ophthalmoscopy (AO-FIO) and microperimetry...
2016: PloS One
https://www.readbyqxmd.com/read/27911444/impact-of-optical-coherence-tomography-scanning-density-on-quantitative-analyses-in-neovascular-age-related-macular-degeneration
#10
S B Velaga, M G Nittala, R K Konduru, F Heussen, P A Keane, S R Sadda
PurposeTo assess the influence of varying B-scan frame-sampling densities on retinal thickness and volume measurements from spectral domain optical coherence tomography (OCT) in eyes with neovascular age-related macular degeneration (AMD).MethodsVolume OCT data (512 × 128 macular cube over 6 × 6 mm) were collected from 39 eyes with neovascular AMD. All 128 B-scans in each image set were manually segmented, allowing quantification of the neurosensory retina, subretinal fluid (SRF), subretinal hyperreflective material (SRHM), and pigment epithelium detachment (PED)...
January 2017: Eye
https://www.readbyqxmd.com/read/27885710/clinical-imaging-of-macular-pigment-optical-density-and-spatial-distribution
#11
REVIEW
Christopher M Putnam
Clinical research continues to provide an increasing number of studies that reveal an association between macular pigment optical density (MPOD) and both visual function and ocular health. As a result, there is a growing need for repeatable, accurate measures of MPOD that can describe peak optical density as well as spatial distribution. Measurement of MPOD in a research setting has an established history encompassing a number of both objective and subjective techniques. Transition of these techniques to a clinical setting has produced an array of commercial devices using three primary methods: heterochromatic flicker photometry, fundus autofluorescence and fundus reflectometry...
November 24, 2016: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27866829/lutein-and-zeaxanthin-supplied-by-red-orange-foods-and-fruits-are-more-closely-associated-with-macular-pigment-optical-density-than-those-from-green-vegetables-in-spanish-subjects
#12
Rocío Estévez-Santiago, Begoña Olmedilla-Alonso, Beatriz Beltrán-de-Miguel, Carmen Cuadrado-Vives
Lutein and zeaxanthin (L+Z) accumulate in the retina. Although vegetables are major contributors to their intake, a stronger association between fruits and macular pigment optical density (MPOD) has been reported. We hypothesized that L+Z intake from fruits would have a stronger association with L+Z status markers (MPOD, serum concentrations) than intake from vegetables or eggs, and that those associations would also differ according to plant foods color. One hundred eight subjects (57 men; age groups, 20-35 and 45-65 years) were enrolled in a cross-sectional study...
November 2016: Nutrition Research
https://www.readbyqxmd.com/read/27857944/macular-carotenoid-supplementation-improves-disability-glare-performance-and-dynamics-of-photostress-recovery
#13
James M Stringham, Kevin J O'Brien, Nicole T Stringham
BACKGROUND: The so-called macular carotenoids (MC) lutein (L), zeaxanthin (Z), and meso-zeaxanthin (MZ) comprise the diet-derived macular pigment (MP). The purpose of this study was to determine effects of MC supplementation on the optical density of MP (MPOD), repeated-exposure photostress recovery (PSR), and disability glare (DG) thresholds. METHODS: This was a double-blind, placebo-controlled trial. Fifty-nine young (mean age = 21.7), healthy volunteers participated in this study...
2016: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/27847632/changes-of-macular-pigment-optical-density-in-elderly-eyes-a-longitudinal-analysis-from-the-mars-study
#14
Verena Meyer Zu Westrup, Martha Dietzel, Meike Zeimer, Daniel Pauleikhoff, Hans-Werner Hense
BACKGROUND: Macular pigment (MP) has been related to the occurrence of age related macular degeneration (AMD). We investigated prospectively in eyes of elderly individuals how magnitude and spatial distribution of MP had changed after 4 years. METHODS: The study included 380 eyes from 237 participants of the Münster Ageing and Retina Study cohort which were free of advanced stages of AMD. MP optical density (MPOD) was measured in density units (D.U.) at eccentricities of 0...
2016: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/27847630/clinical-applications-of-fundus-autofluorescence-in-retinal-disease
#15
REVIEW
Madeline Yung, Michael A Klufas, David Sarraf
Fundus autofluorescence (FAF) is a non-invasive retinal imaging modality used in clinical practice to provide a density map of lipofuscin, the predominant ocular fluorophore, in the retinal pigment epithelium. Multiple commercially available imaging systems, including the fundus camera, the confocal scanning laser ophthalmoscope, and the ultra-widefield imaging device, are available to the clinician. Each offers unique advantages for evaluating various retinal diseases. The clinical applications of FAF continue to expand...
2016: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/27826180/preliminary-analysis-of-the-relationship-between-serum-lutein-and-zeaxanthin-levels-and-macular-pigment-optical-density
#16
Shigeto Fujimura, Kohei Ueda, Yoko Nomura, Yasuo Yanagi
PURPOSE: To assess the relationship between combined serum lutein and zeaxanthin (L+Z) concentration and macular pigment optical density (MPOD), and to investigate the effect of L+Z+docosahexaenoic acid (DHA) dietary supplementation on the spatial distribution of MPOD. METHODS: Twenty healthy fellow eyes with unilateral wet age-related macular degeneration or chronic central serous chorioretinopathy were included. All participants received a dietary supplement for 6 months that contained 20 mg L, 1 mg Z, and 200 mg DHA...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27803860/association-of-macular-pigment-optical-density-with-early-stage-of-non-proliferative-diabetic-retinopathy-in-chinese-patients-with-type-2-diabetes-mellitus
#17
Chong-Yang She, Hong Gu, Jun Xu, Xiu-Fen Yang, Xue-Tao Ren, Ning-Pu Liu
AIM: To detect the association between macular pigment optical density (MPOD), which reflects the antioxidant ability of retina, and diabetic retinopathy (DR) and to investigate the correlated factors of MPOD. METHODS: Totally 435 subjects of urban Chinese were recruited to the study and divided into 3 groups: non-diabetes mellitus controls (NDM), diabetic patients without retinopathy (DWR), and patients with early stage of non-proliferative diabetic retinopathy (DR)...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/27776568/relationship-of-lutein-and-zeaxanthin-levels-to-neurocognitive-functioning-an-fmri-study-of-older-adults
#18
Cutter A Lindbergh, Catherine M Mewborn, Billy R Hammond, Lisa M Renzi-Hammond, Joanne M Curran-Celentano, L Stephen Miller
OBJECTIVES: It is well known that the carotenoids lutein (L) and zeaxanthin (Z) improve eye health and an accumulating evidence base suggests cognitive benefits as well. The present study investigated underlying neural mechanisms using functional magnetic resonance imaging (fMRI). It was hypothesized that lower L and Z concentrations would be associated with neurobiological inefficiency (i.e., increased activation) during cognitive performance. METHODS: Forty-three community-dwelling older adults (mean age=72 years; 58% female; 100% Caucasian) were asked to learn and recall pairs of unrelated words in an fMRI-adapted paradigm...
January 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/27775222/monitoring-macular-pigment-changes-in-macular-holes-using-fluorescence-lifetime-imaging-ophthalmoscopy
#19
Lydia Sauer, Sven Peters, Johanna Schmidt, Dietrich Schweitzer, Matthias Klemm, Lisa Ramm, Regine Augsten, Martin Hammer
PURPOSE: To investigate the impact of macular pigment (MP) on fundus autofluorescence (FAF) lifetimes in vivo by characterizing full-thickness idiopathic macular holes (MH) and macular pseudo-holes (MPH). METHODS: A total of 37 patients with MH and 52 with MPH were included. Using the fluorescence lifetime imaging ophthalmoscope (FLIO), based on a Heidelberg Engineering Spectralis system, a 30° retinal field was investigated. FAF decays were detected in a short (498-560 nm; ch1) and long (560-720 nm; ch2) wavelength channel...
October 24, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27767345/bayer-filter-snapshot-hyperspectral-fundus-camera-for-human-retinal-imaging
#20
Joel Kaluzny, Hao Li, Wenzhong Liu, Peter Nesper, Justin Park, Hao F Zhang, Amani A Fawzi
PURPOSE: To demonstrate the versatility and performance of a compact Bayer filter snapshot hyperspectral fundus camera for in-vivo clinical applications including retinal oximetry and macular pigment optical density measurements. METHODS: 12 healthy volunteers were recruited under an Institutional Review Board (IRB) approved protocol. Fundus images were taken with a custom hyperspectral camera with a spectral range of 460-630 nm. We determined retinal vascular oxygen saturation (sO2) for the healthy population using the captured spectra by least squares curve fitting...
April 2017: Current Eye Research
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