Archive for 2008

Dec 31 2008

Artificial Retina Project

Scientists through the US Department of Energy are testing artificial retinas that they hope can restore partial sight to people who’ve lost their vision to the most common causes of blindness.

The Sylmar, Calif., company produced the devices for the U.S. Energy Department’s Artificial Retina Project. The department has been engaged in biological research since the atomic bomb tests of the 1950s raised fears of radiation poisoning.

The current version is being tested on 17 blind people in the U.S. and Europe, and more patients are being enrolled. At a retina conference in October, patients reported improvements in orientation and mobility. They were able to find a door from 20 feet away and to follow a line on the floor for 20 feet, Mech reported.

Meanwhile, researchers in the Energy Department’s National Laboratories are creating a third-generation artificial retina. Much smaller than its predecessors, the device will contain 200 or more electrodes on a thin, flexible film that curves to fit the shape of the retina. Human tests are scheduled to begin in 2011.

For more information, go to http://artificialretina.energy.gov/index.shtml

For more information and specific research studies by eye condition on nutrition and vision, go to Natural Eye Care



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Dec 31 2008

Lutein and Retinitis Pigmentosa Study

Published by Marc under Retinitis Pigmentosa

In a 48-week intervention trial, researchers tested Lutein supplementation
for vision protective-function in patients with retinitis pigmentosa (RP). The conclusion of the study was as follows: “Comparing the development of vision measures against the natural loss expected to occur over the course of the 48 weeks, most measures showed reduced decline, and these reductions were significant for normal illumination”.

Ophthalmology (BMC Ophthalmology 2006, 6:23)

For more related research studies, see the “Research” section at www.naturaleyecare.com




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Dec 30 2008

Losing Abdominal Fat May Reduce Risk of AMD

Published by Karin under macular degeneration, nutrition

Accumulated weight around the waist (abdominal fat) may be linked to an increased risk of age-related macular degeneration (AMD). AMD is the most common cause of loss of vision and blindness in adults.

A recent study published in the Archives of Ophthalmology examined the association between changes in the waist-to-hip ratio (a measure of abdominal obesity) and risk of AMD. A total of 12,515 people aged 45 to 64 were followed over six years.

Researchers found that a higher waist-to-hip ratio (WHR) was associated with elevated risk of AMD.

The good news is that study participants who reduced their WHR generally saw a reduction in risk of AMD. Overall, a 3 per cent or more decrease in WHR was associated with a 29 per cent reduced risk of AMD. The effect was greatest among those participants classified as obese: a decrease in WHR was associated with 59% lower odds of AMD.

Researchers concluded that middle-aged people who had a 3% or greater reduction in WHR over time were less likely to have AMD, particularly among those who were initially obese.

Learn more about Age-Related Macular Degeneration (AMD)

SOURCE: Peeters, et al. Changes in Abdominal Obesity and Age-Related Macular Degeneration: The Atherosclerosis Risk in Communities Study, Arch Ophthalmol. 2008;126(11):1554-1560

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Dec 29 2008

Vitamins E and B May Slow Lens Opacity

Published by Karin under cataracts, nutrition

Long-term use of vitamin E supplements, as well as increased intake of riboflavin (vitamin B2) and/or thiamin (vitamin B1), may help reduce the progression of age-related lens opacification.

Lens opacification (or clouding) is caused by the disruption of the transmission of light through the eye lens due to damage to the lens cells.  When the opacification creates a reduction in visual acuity, it is referred to as a cataract.   Studies suggest that oxidation is responsible for much of the damage to the lens and that antioxidants, such as vitamins C and E, might protect the lens against formation of cataract.

Researchers conducted a five-year study of 408 women from the Nurses’ Health Study, aged 52 to 74 years at baseline. The women’s nutrient intake was calculated from five food frequency questionnaires collected over a 13- to 15-year period.  During this time the duration of vitamin supplement use was assessed using seven questionnaires.  At the end of this period the degree of nuclear density was determined.

Women who never supplemented with vitamin E had a 42% higher risk of getting cataracts than women who had supplemented vitamin E for 10 years.

Researchers concluded that long-term use of vitamin E supplements and higher riboflavin and/or thiamin intake may reduce the progression of age-related lens opacification.

Where can you find good sources of these vitamins?

  • Vitamin E can be found in almonds, asparagus, avocado, nuts, olives, red palm oil, seeds, spinach and other leafy vegetables, wheat germ, and milk
  • Riboflavin is found naturally in asparagus, bananas, okra, chard, cottage cheese, milk, yogurt, meat, eggs and fish.
  • Foods rich in thiamin include yeast, oatmeal, brown rice, whole grain flour (rye or wheat), asparagus, kale, cauliflower, potatoes, oranges, liver (beef or pork), and eggs.

Learn more about cataracts, including recommended vitamins and supplements

Source:  Jacques, et al, Long-term Nutrient Intake and 5-Year Change in Nuclear Lens Opacities, Arch Ophthalmol. 2005;123:517-526.

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Dec 28 2008

Smoking Increases Risk of Age-Related Macular Degeneration

Published by Karin under macular degeneration, nutrition

Data in US Twin Study also shows consumption of fish rich in omega-3 fatty acids helps fight AMD

In a study of male twins, research shows that those who smoke have an increased risk of developing age-related macular degeneration.  Men who ate more fish rich in omega-3 fatty acids had a lower risk of developing the disease.

Researchers collected data on 681 elderly male twins from the National Academy of Sciences National Research Council World War II Veteran Twin Registry.  The twins were given an eye exam and completed a food frequency and a risk-factor questionnaire.  222 of the twins had intermediate and late-stage age-related macular degeneration, while 459 of the twins had no signs of the disease.

The study showed that current smokers had a 1.9-fold increased risk of developing age-related macular degeneration, while past smokers had about a 1.7-fold increased risk.

Consumption of omega-3 fatty acids from fish reduced the risk of AMD, particularly if two or more servings of fish were consumed each week.

Although researchers noted that genetics are important in determining who will get AMD, lifestyle choices, such as smoking, play a role as well. 

What can you do to reduce your risk of AMD?  Eat a healthy diet, including omega-3 fatty acids from fish such as mackerel, lake trout, sardines, albacore tuna and salmon.  Experts also recommend exercising, refraining from smoking, and maintaining a normal healthy weight.

Learn more about Age-Related Macular Degeneration (AMD)

Read more studies about the benefits of omega-3 fatty acids for healthy vision

SOURCE:  Seddon, et al; Cigarette Smoking, Fish Consumption, Omega-3 Fatty Acid Intake, and Associations With Age-Related Macular Degeneration; Arch Ophthalmol. 2006;124:995-1001.

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Dec 21 2008

Sunlight Exposure Plus Low Antioxidant Levels May Place Older Adults at Risk for AMD

A new European study suggests that the combination of low levels of antioxidants and blue light exposure from the sun is associated with certain forms of age-related macular degeneration (AMD).

The EUREYE study, led by Astrid Fletcher, Professor of Epidemiology of Ageing at the London School of Hygiene & Tropical Medicine, is the first to report an adverse association between sunlight exposure and AMD in people with low levels of antioxidants.

It is known that the eye is vulnerable to the damaging effects of sunlight. Ultraviolet radiation is absorbed by the lens, but visible or “blue” light penetrates to the retina, enabling us to see. Protection against the harmful effects of blue light is provided by antioxidant enzymes—including vitamins C and E, the carotenoids (lutein and zeaxanthin) and zinc.

Researchers measured levels of these nutrients in the blood of 4,753 older adults (average age 73.2) who were part of the European Eye Study. Participants were interviewed about their lifetime sunlight exposure and had photographs taken of their retinas to detect AMD.

Participants with the lowest concentrations of antioxidants in the blood were found to be most at risk of AMD due to blue light exposure. In fact, participants with the combination of blue light exposure and low levels of zeaxanthin, alpha tocopherol and Vitamin C were nearly four times more likely to develop AMD. Researchers also noted that blue light exposure in middle age might be more damaging than at younger ages.

Professor Fletcher comments: ‘In the absence of cost-effective screening methods to identify people in the population with early AMD, we suggest that recommendations on protecting the eyes, ensuring that diets contain the right nutrients and antioxidants, are targeted at the general population, and especially middle-aged people’.

Study authors don’t advise people to stay out of the sun altogether — sunlight is important for its role in vitamin D synthesis. However, they do recommend avoiding exposing eyes to too much sunlight by wearing a wide-brimmed hat and sunglasses when outdoors.

In addition, study authors advise consumption of key antioxidants, which can be accomplished by consuming recommended dietary intake levels of vitamin C and zinc and increasing consumption of carotenoid-rich fruits and vegetables.

Learn more about macular degeneration

Read more about antioxidants and nutrient food sources for good eye health

SOURCE: Fletcher AE et al. Sunlight exposure, antioxidants, and age-related macular degeneration. Archives Ophthalmology 2008; 126:1396-1403.

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Dec 19 2008

Antioxidant-Rich Diet May Protect Against Eye Disease

Published by Marc under macular degeneration

U.S. researchers found that antioxidants disrupt a link between two processes in the retina that, in combination, contribute to macular degeneration. Antioxidants also extend the lifetime of irreplaceable photoreceptors and other retinal cells.

The “destructive synergy” that causes macular degeneration occurs when a buildup of a compound called A2E disrupts energy production in mitochondria, the “power plants” in cells, the researchers said. The lack of energy interferes with daily cleaning and maintenance of photoreceptors and another type of retinal cell. This leads to more buildup of A2E and a continuing cycle that results in the destruction of the vital visual cells that can’t be replaced.

The study was published online in the Journal of Biological Chemistry.

For more information and specific research studies by eye condition on nutrition and vision, go to <a href=”http://www.naturaleyecare.com”>Natural Eye Care for Macular Degeneration</a>

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Dec 18 2008

A Diet High in Antioxidants May Help Prevent Glaucoma in Black Women

Published by Karin under glaucoma, nutrition

At the American Glaucoma Society meeting, Dr. JoAnn A. Giaconi reported that women who reported eating greater amounts of fruits and vegetables appeared to have a lower likelihood of developing glaucoma.

The foods that seemed especially protective included fresh oranges, peaches, spinach, collard greens, and kale.

Dr. Giaconi presented results from a review of data from the Study of Osteoporotic Fractures.  In this study involving a subset of 584 black women, glaucoma was diagnosed in at least one eye in 77 participants.  Disc photos and suprathreshold visual fields were evaluated in conjunction with Block Food Frequency Questionnaires on the participants’daily food consumption.

The results?

  • Eating three or more servings of fruit or fruit juices daily decreased the odds of black women developing glaucoma by 79%
  • Eating one serving of collard greens or kale decreased the odds of glaucoma by 57%
  • Eating more than two servings per week of fresh oranges and peaches also significantly decreased the chance of developing glaucoma.

Researchers believe that the antioxidants in fruits and vegetables (vitamin A, alpha- and beta-carotene, folate, lutein, zeaxanthin) can potentially block oxidation stress that can lead to cell damage in glaucoma.

Read other studies about the benefits of consuming antioxidants

SOURCE:  Giaconi JA, et al. Nutritional associations with glaucoma among older black women. Paper presented at: The 18th Annual AGS Meeting; March 8, 2008; Washington, DC.

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Dec 15 2008

The Yoga of Vision

Published by Karin under yoga

An article by Marc Grossman

The term “yoga” literally means “union.” It is so named because its practice leads to the integration of the physical, mental, and spiritual energies that, together, enhance health and well-being. Yoga teaches the basic principle of mind/body unity. If the mind is chronically restless and agitated, the health of the body will be compromised, and if the body is in poor health, mental clarity and strength will be adversely affected. The practice of yoga can counter these ill effects, restoring mental and physical health.

The eyes are, after all, simply tools of the mind. They are made out of brain tissue, as if the brain itself has pushed its way out of the skull, in the same way a seed pushes its way out of the soil in order to see the light. The eyes are the brain’s expression of itself on the surface of the human body; vision is the method by which the brain knows the world and gathers enough information to make itself known to the world at large. To me that is why the eyes are so mysterious, so filled with meaning. They are the tools (basically they are just like video cameras mounted on the front of our heads) that allow us to interrelate our minds with the world around us.

And yet, I can’t truly say that the eyes are simply receptive in their function. They are organs of both receiving and giving. They are reflections of our soul, of who and where we are at any given moment on all levels of being—physical, emotional, mental, and spiritual.

Therefore, similar to yoga philosophy, to really work on clarity of vision, you must work on yourself as a whole being and you must understand that vision involves relationships.

Even on the most basic level, sight involves the intimate relationship between the person seeing and the object or person being seen. On a more profound level, vision evolves based on your relationships with yourself, your loved ones, your community, your world, and your Spirit. Therefore, your ultimate goal should never stop with simple visual clarity. Rather, it is to move toward having spiritual clarity.

So the natural vision philosophy and yoga practice can weave together to help one achieve higher levels of mind/body unity. This article will give an overview of natural vision therapy.

History of Natural Vision Therapy

Over the centuries, there has been much discussion as to who was the first man to make a pair of glasses. We know that the Egyptians busied themselves with vision therapy. They worked with eye-teaming problems with the use of a mask that had two small eye holes in it, placed far apart. The idea was that the overly convergent patient would have to work hard to have his two eye see out of the holes.

The idea of vision therapy, in fact, predates the concept of glasses by thousands of years. And this is important. Many of us live with the misconception that vision therapy—or, to name it more correctly, Natural Vision Improvement—was invented at the beginning of the last century by a man named William Bates. But while Bates certainly had a huge impact upon the idea that we could learn to see better naturally if we would only exercise both our eyes and our vision, he was certainly not the creator of the concept.

The concept of vision therapy, of improving how we perceive the world visually, was perhaps originally the work of Greek philosophers, who were themselves trying to understand the world.

And they came to quite a good understanding; they understood vision to be a dynamic process, one that involves an interaction, a relationship, between the viewer and the viewed. Plato himself insisted that the eyes not only took in energy but sent it forth as well. And he insisted that the visual system did more than take in images, that it perceived information as well. And the aspect of self that actually perceived the world, Plato insisted, was the human soul.

By the time of the Roman Empire, the concept of naturally improving vision had, at least to some degree, been replaced through the use of corrective lenses. Whether or not actual pairs of glasses were being made is doubtful, but Pliny reports that Nero used a concave gem set in a ring that he placed before his eye in order to see the games in the Coliseum in Rome.

Natural Vision Improvement Philosophy In today’s world, we tend to take vision problems in stride. We have, in fact, focused most of our attention on the clarity of the image itself, so that we tend not to even diagnose many other forms of vision disorder, such as eye teaming or suppression of the image in an eye. Instead, we slap a pair of glasses on our patient’s face.

I want you to be aware that a pair of glasses has never fixed the vision problems of a pair of eyes. Never has and never will. Quite the opposite, in fact. Because when that pair of lenses makes everything clearer, makes better vision possible, the eyes behind the lenses actually stop trying so hard to see. They let the lenses do the seeing for them. And that is why, a year or so later, much of the time, that same patient will need another pair of glasses, with stronger lenses.

It is important to remember that, when considering the workings of the world, the Greek philosophers did not say to themselves, “What can be put in front of the eyes in order to make vision clearer?” but instead asked, “How can we help these eyes to see more clearly, to perceive more correctly?”

In the eighteenth century, George Berkley, in his “Essay Toward a New Theory of Vision” again insisted upon a philosophy that vision was more than just an optical event. He wrote that the ability to perceive distance was not something that happened in the eye alone but that needed to be integrated between the eye and the brain.

Berkley was lauded for his work with the blind. He wrote, “When a congenitally blind person was surgically given sight, he was, at first, so far from making any judgment about distances that he thought all objects touched his eyes… He knew not the shape of anything, nor any one thing from another, however different in shape or magnitude.”

This observation gave rise to the idea that the judgment of distance is something more than an innate ability.

During this same time period, the philosopher Spinoza gave additional insight as to how vision really works. He theorized that the image that our eyes see is affected by past experience, and, therefore, is affected both by our memory (our interpretation of past experience) and by our beliefs (or biases). Spinoza also theorized that mind and body could not be separated, since they were one and the same thing.

The idea of natural vision improvement was further refined in the teachings of modern era philosophers George Gurdjieff and his student Ouspensky. Each spoke a good deal on the subject of “self-observation,” a concept that, simply put, tells us that “to know others, one must first know oneself.” Thus, self-observation is the key to awareness and attention.

Both state further that, to really know oneself properly, “one must first of all remember oneself.” And that this remembering is a nonanalytic way of directing attention onto oneself without weakening or detracting one’s attention from other things.

Ouspensky illustrates his point using an arrow that extends from the individual and points to that which the individual observes:

I ——> The Observed Phenomenon

If, however, while observing, one tries to “remember oneself,” attention is now directed both toward the object as well as toward the self. He illustrates this point by using a line with two arrowheads, connecting the observer with that which he observes:

I <——> The Observed Phenomenon

Understanding that there will be a great resistance to “self-remembering,” Oupensky advises that the first step one should take is to realize that one is not fully conscious all the time. “When we realize this and observe it for some time, we must try to catch ourselves at the moments when we are not conscious and, little by little, this will make us more conscious.”

In other words, by suggesting that you observe yourself as you are in the process of observing and perceiving the world around you, Gurdjieff and Ouspensky are advising that one live in the present moment. This, of course, is part of the philosophy of natural vision improvement, and an important part in attaining greater vision.

Fritz Perls, founder of Gestalt Therapy taught that “ultimate awareness can only take place when the computer is gone, if the interaction, the awareness, is so bright that one really comes into his senses.” He concluded, “Lose your mind and come into your senses.”

Krishnamurti said, “One must begin to observe and listen, not only to what is being said, but also to your distortions, as you are observing, see your prejudices, your opinions, your images, your experiences, and see how they prevent you from observing.”

All of these philosophers—from Gurdjieff and his “Remember yourself” to Perls and his “awareness” to Krishnamurti in his insistence that you “observe”—have helped to shape the philosophy by which natural vision improvement is practiced today, as they all emphasize the importance of total awareness of what is happening at the moment. Happening both internally and externally. They insist that we must be a witness, both to history and to our interpretation of that history.

A philosopher who touched my life personally was Carlos Castenada and his character Don Juan. He says that, by “talking to ourselves too much and by repeating the same talk and the same choices over and over again, we maintain our world.” For Castenada, a “warrior” is the man of knowledge. The man who knows the effects of this inner dialogue and seeks to end the inner chatter. A warrior “listens to the world … and … is aware that the world will change as soon as he stops talking to himself.” Again, more of the shapings of the idea of greater vision: our internal chatter lessens as we are more in our own vision and less inside our own heads.

The philosophy of Traditional Chinese Medicine and Ayurvedic medicine is another important tool in shaping my practice of natural vision improvement. The Chinese and Ayurvedic model are holistic ones, based on the idea that no single part can be understood except in relation to the whole. A symptom is not traced back to the cause, but is looked on as a part of the totality. These models are based in the wonderful concept that we cannot measure static “things” in order to find answers for our problems—that to understand the root cause of a problem, we need to look at interactions and relationships. These practitioners look for “patterns of disharmony.” For them, direct cause and effect is secondary to the overall pattern of Nature. Remember: don’t ask, “How does X cause Y?” Instead, ask, “What is the relationship between X and Y?”

The same is true for every sort of disease and allopathic medical treatment. Medicine, for the allopath, is sort of a “quid pro quo” prospect. Diagnose the disease based upon the presence or absence of the causative agent and then treat the diagnosed disease based upon the course of action that the diagnosis suggests. But what about the thousands of other things that are tied to that causative agent? What about the relationship of the disease to the human with the disease and the relationships of his myriad of symptoms both good and bad? Where is the consideration of all this in standard allopathic treatment? Indeed, where is the consideration of the patient?

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Dec 13 2008

Stagard’t Disease and Avoiding Vitamin A Supplements

Studies show that people with Stargardt’s Disease genetically do not make an enzyme to get rid of the waste products from metabolized Vitamin A analogs and the build up of these waste products leads to the death of retinal cells, so supplementing with Vitamin A should be avoided. Also, certain foods should be restricted that are high in Vitamin A. Fruits to be restricted include: tomatoes, cantaloupes, watermelon, peaches, kiwi, oranges, and blackberries. Vegetables high in Vitamin A include: carrots. kale, spinach and sweet potatoes.

For more information and related studies, go to www.naturaleyecare.com .

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