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Literature Review - June 2014

Lutein is a carotenoid that varies in breast milk depending on maternal intake. Data are lacking with regard to the effect of dietary lutein supplementation on breast milk lutein concentration during lactation and subsequent plasma lutein concentration in breast-fed infants. This study was conducted to determine the impact of lutein supplementation in the breast milk and plasma of lactating women and in the plasma of breast-fed infants 2-3 mo postpartum.

The Impact of Optic Disc Size on Differential Dx of Optic Nerve Disorders Using SDOCT

Congenital Microdisc

The Impact of Optic Disc Size on Differential Dx of Optic Nerve Disorders Using SDOCT

The power of spectral domain OCT (DIGITAL IMAGING) is incredibly impressive. Spectral Domain Optical Coherence Technology (SDOCT) has redefined the diagnosis and management of ocular disorders. However, the clinician interpreting the data must understand that anatomical characteristics can confound the resulting scans allowing for potential misinterpretation. Disc size and morphology is critical in the consideration of anatomical variations and how they impact on results and interpretation.

Literature Review - Feb 2014

Macular pigment optical density (MPOD) and age-related macular degeneration (AMD) are thought to be associated; however, the details are not yet clearly understood. This study aimed at investigating how retinal anatomical structures relate with the spatial MPOD distribution in single eyes. Study setting and methods: In a subgroup of the third follow-up examination of the Münster Aging and Retina Study (MARS) cohort (mean age 78.4 years), 124 single eyes of 79 participants were examined. MPOD was assessed using 2-wavelength autofluorescence (AF). Retinal thickness (RT) and fovea pit profile slopes were measured using optical coherence tomography (OCT). 

The Power of Focal Loss Volume (FLV%) and Global Loss Volume (GLV%) in the Diagnosis and Management of Glaucoma as Measured by Visual Field Progression

The Power of Focal Loss Volume (FLV%) and Global Loss Volume (GLV%) in the Diagnosis and Management of Glaucoma as Measured by Visual Field Progression

The analysis of the Ganglion Cell Complex is a measure of thinning of the inner retinal layers…the neurological representation of the retina. There are a number of ways to assess the Ganglion Cell Complex (GCC) thickness metric available on SD-OCT devices. Overall average thickness may be depressed in a number of conditions including normal tension glaucoma, primary open angle glaucoma, retinal arterial occlusive disease, type 1 diabetic retinopathy, sleep apnea, and the dementias. There may be isolated pockets of thinning in the GCC in other conditions such as normal tension glaucoma and ischemic optic neuropathy. Asymmetry, which is critical to all differential diagnosis, is highlighted by most SDOCT instruments.

More attention is now being directed at other quantifiable aspects of this Ganglion Cell Complex feature including the metrics focal loss volume percentage and global loss volume percentage. The only devices currently approved to calculate Focal Loss Volume Percentage (FLV%) and Global Loss Volume Percentage (GLV%) are those manufactured by Optovue, Inc Fremont CA. The FLV% and GLV% concept is illustrated in the following graphic. FLV% demonstrates “the potholes in the topography of the Ganglion Cell Complex” and GLV% shows an “overall thinning of the topography of the Ganglion Cell Complex.” Both the FLV% and GLV% are now revealing potential in assistance in differential diagnosis and management of ocular disease.

Vitreomacular Adhesion And A New Treatment Option… Jetrea®

AN INTRODUCTION TO A NOVEL TECHNOLOGY

Vitreomacular Adhesion And A New Treatment Option… Jetrea®

The vitreoretinal interface (VRI) contains a diverse mix of extracellular molecules, including collagen, laminin, and fibronectin, that facilitate the adhesion between the vitreous cortex and the innermost retinal layer (the internal limiting membrane—ILM).

Recent imaging advances in optical coherence tomography (spectral domain; SD-OCT) have advanced the accuracy with which diseases of the VRI are diagnosed and managed. Even though patients may be totally asymptomatic, issues such as vitreomacular adhesion and vitreomacular traction may be present. While many do not warrant consultation for possible intervention, the primary-care practitioner will nonetheless uncover the “sleeping condition” with spectral domain optical coherence tomography (SD-OCT) and will need to make decisions.

The Mystery, Science and Art of Van Gogh

Assembled with Deepest Respect

The Mystery, Science and Art of Van Gogh

As a health care provider with attention to vision, I have always been fascinated by the techniques and choices of artists. I am a fan of many different art forms but the complexity of van Gogh has been a topic through the ages. I have herein taken a look at some of the theories regarding the basis of his creativity as well as offering another potential explanation based on color vision theory.

Tuesday, 04 March 2014 Written by Larry J Alexander OD FAAO Posted in Philosophy/Editorials

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