Aging is inevitable, but this is not the loss of eyesight, since it largely depends on lifestyle, not chronological age. The risk of developing glaucoma, one of the most common causes of vision loss in adults, may be reduced to 73 percent with a daily moderate or vigorous exercise, according to the study.
Aging is inevitable, but it is not required of diseases that often are associated with it. One of the States, the emergence of which many people expect over time, – is the worsening of vision. However, contrary to popular opinion, it largely depends on your lifestyle, not chronological age. Some of the most common causes of vision loss with age include cataracts, diabetic retinopathy and macular degeneration, and glaucoma.
Exercise reduces the risk of blindness
In the survey, Johns Hopkins University scientist found that nearly half of Americans said that vision loss is “the worst possible” health problems. Blindness scared people more than deafness or loss of limb.
There are several common strategies that can help protect your vision, including cessation of Smoking, normalization of blood sugar levels and reducing consumption or rejection of aspartame and processed TRANS fats.
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Your eyes depend on nutritional support, but recent studies also show that exercising with high intensity can reduce the risk of developing glaucoma by as much as 73 percent.
Structure and function of your eyes
Your eyes is a complex sphere that turns light in color and shapes that your brain interpretered as images. Each eye constantly adjusts the amount of light that penetrates the lens, focusing on objects nearby and far away, almost instantaneously transmitting information to the brain.
Inside your eye there are many different bodies responsible for the function of vision. It starts with the fact that light passes through the cornea, a transparent, dome-shaped surface that covers the front part of the eye.
She is responsible for the refraction of light to reach the retina, while the iris, the colored part of the eye that regulates size of the pupil, determining how much light gets inside. Right behind it is the lens, the transparent part that focuses light onto the retina.
Your retina located in the back of the eye, is a thin fabric with a light-sensitive photoreceptor cells that convert light into electrical signals. These signals move from the retina through the optic nerve directly into the visual cortex of the brain, where the signals are processed and interpreted as color, shape, movement and depth.
Your optic nerve acts like a fiber optic cable with about 1 million nerve fibers that transmit this information. Your vision can be affected at any moment in this process. For example, color blind people have a reduced number of photoreceptors in the specific color fields, making it impossible for the brain to correctly interpret the color of the electrical signals that were not generated.
In the case of myopia, the lens has a defect of refraction. In other words, it does not refract the light to the image formed on the retina but in front of her. This can lead to that you will clearly see close objects, but those that are further away will be blurred.
Exercise may reduce risk of glaucoma
A team of researchers from the University of California used data from the national survey on health and nutrition (NHANES) for comparison, the least active people with those who were the most active against the risk of developing glaucoma.
NHANES is a large survey that monitors the health and nutrition of adults from the 1960s years and is unique in that participants also undergo regular medical examinations and interviews.
For many years it was assumed that lifestyle choice does not affect the intraocular pressure, but recent studies have shown that exercise influence on it and on the blood flow to the eyes.
Lead author Dr. Victoria Tseng and her colleagues used data from NHANES to analyze the difference in risk depending on exercise intensity.
Until 2003 the study used a self-assessment of patients to determine the level of activity, but after the participants were used for this portable device. Using data from devices, Tseng determined the level of activity, based on the number of steps per minute and walking speed. 7000 steps per day were considered equal 30 minutes of moderate exercise five days a week.
Tseng and her colleagues found that those who showed physical activity of moderate to vigorous measurement research, had a 73 percent lower risk of developing glaucoma.
The results of the study were presented at the 121st annual meeting of the American Academy of ophthalmology (AAO) in New Orleans.
What is glaucoma?
The study showed that workout reduces pressure inside the eye, the primary symptom of glaucoma, which causes damage and eventually, blindness.
The disease damages the optic nerve when fluid accumulates in front of the eye and creates additional pressure. In a healthy eye, clear fluid, called aqueous moisture, circulates in the anterior segment (front part) of the eye between the iris and the cornea.
A small amount of fluid is continuously produced and circulates in the chamber. To maintain a constant pressure, the outflow of an equal amount of moisture from this area in two structures.
The trabecular meshwork drains 85 percent of the aqueous humor and plays a vital role in modulating the amount of liquid that is either flowing or remains in the anterior chamber.
Physical changes and changes of signaling pathways in the trabecular network can cause an increase in pressure in front of the eye, which then presses on the rear camera and end up on the optic nerve.
Cells in the trabecular network create and maintain structure, providing a natural obstacle to the outflow of aqueous humor. There is evidence that this process is damaged in patients with primary open-angle glaucoma, which accounts for almost 90 percent of all cases of this disease.
The term “open-angle” means that the area where the iris is joined to the cornea is as wide and open as possible. Damage in this type is slow, their symptoms are invisible, until you begin to lose sight.
To detect this type of glaucoma at an early stage, you should regularly check the intraocular pressure from a qualified specialist.
Angle-closure glaucoma, also called narrow-angle, is much rarer and is acute, requiring immediate medical attention. It is caused by blocked outflow of the aqueous humor, which rapidly increases the intraocular pressure. The symptoms are very visible and require immediate attention of a doctor to prevent the development of permanent blindness.
What is your risk?
There are several factors that increase the risk of developing glaucoma. According to the AAO, they include:
The risk is higher in the age group over 40 if you are African American and over the age of 60 for all others.
If you have an eye injury, myopia or hyperopia, the risk of developing glaucoma increases. Other diseases that may increase the risk include diabetes, high blood pressure and heart problems. Long-term use of corticosteroids for treating other diseases may also be a factor.
This is a progressive corneal thinning that occurs in 1 in 2000. It often happens. Although the cause is unknown, researchers believe that it may be caused by genetic predisposition and environmental influence. As soon as the cornea is reduced, the anterior chamber of the eye is distorted and increases the risk of high blood pressure.
- Degeneration of the optic nerve
Also known as atrophy, is a condition is glaucoma, directly affecting the health of the optic nerve. Degeneration may occur with increasing or without increasing intraocular pressure, but it is usually accompanied by mechanical damage in the place where the optic nerve enters the back of the eye. The decrease in blood flow can be a factor in degeneration. Some believe that in cases of glaucoma with normal pressure a problem with blood flow may play an important role.
People who have first-line relatives with glaucoma have a higher risk than others. Open-angle glaucoma associated with age, comes from more than one of the genetic mutations that are conducive to the development of the disease. However, the lifestyle choices affect the expression of these genes.
The best choice to maintain eye health
- Balance the exposure to blue light
Blue is part of the spectrum of visible light with very short wavelength and lots of energy. Scientists know that it penetrates deeper into your eyes. Over time, it can damage the retina. Although it is not associated specifically with glaucoma, the restriction of blue light, especially after sunset, may help reduce the risk of age-related macular degeneration, which is one of the leading causes of blindness in the elderly.
- Normalize blood sugar
Excessive intake of sugar and insulin resistance can cause an outflow of fluid from the lens of your eye, affecting vision and ability to focus. Elevated sugar levels for a long time and diabetes can damage the blood vessels in the retina, impede blood circulation and damage your eyesight forever.
- Lutein and zeaxanthin
It is a powerful antioxidant plant compounds. Lutein is found in green leafy vegetables such as spinach and cabbage, colorful vegetables, such as carrots, broccoli, red and yellow peppers, tomatoes and spices. Many of these products also contain large amounts of zeaxanthin.
This nutrient is produced by microalgae in the absence of water for protection against ultraviolet radiation. You can get it caught in the wild Alaskan salmon, but you may need a Supplement to bring tangible benefits. Astaxanthin is a carotenoid, which can be one of the most important nutrients that protect against blindness.
- Vitamin C
Although this powerful antioxidant protects from glaucoma, it can protect you from cataracts, which is the second most common cause of vision loss. According to the National eye Institute, more than 50 percent of Americans develop cataracts by age 80.
- Animals omega-3 fats
Diabetic retinopathy is a serious complication of type 2 diabetes, which occurs when blood flow to the retina is difficult. In a study from the journal of the American medical Association researchers found in middle-aged and elderly with type 2 diabetes who consumed 500 mg of omega-3 fats a day from two servings rich in omega-3 fish per week, an impressive 48 percent lower risk of developing diabetic retinopathy.
The benefits of exercise not only for physical health
Although exercise benefit your physical health in countless number of ways, such as improved mobility, heart health and eye, control weight, manage blood sugar and reduce your risk of developing certain types of cancer, it is important to remember about the mental and emotional benefits.
This, in turn, may encourage you to continue your fitness journey.
Exercises are one of the most effective ways to improve mental health and motivation. They reduce stress, fight depression and anxiety, improve sleep and increase self-esteem.
Each of these factors helps you not to stop and continue to play sports, to make decisions on maintaining a healthy lifestyle, increase their productivity, creativity and efficiency.
Thus, while exercise greatly benefit physical health in the long term, they can also be the deciding factor that will help you choose the right lifestyle that will affect your daily existence.published econet.ru.
© Joseph Mercola
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