Selasa, 21 Juni 2011

Normal foods improve our eyesight

In order to avoid the pain caused by myopia, we should try our best to improve eyesight. However, few people really know how to improve vision in our everyday life. In fact, some common foods we improve our eyesight effectively will help. These foods include fish, broccoli, Carrot, green tea and orange.

Fish contains abundant omega-3 fatty acids. We perceive the adequate omega-3 fatty acids through the consumption of fish, to prevent macular degeneration, which may lead to blindness. If we may be unable to reduce macular degeneration over time, our eyes can easily State, you set and setting. Therefore, we often eat fish in our everyday life.

Broccoli contains lots of vitamins and lutein. We can add the appropriate vitamins for improving eyesight and preventing the various ocular diseases such as Glaucoma. At the same time, we perceive the lutein rolled his eyes and to prevent blindness. Vitamins and lutein may also cooperate in our body by free radicals and maintaining the health of our eyes.

Carrot contains rich in beta carotene. According to medical research carotene plays an important role in the protection of our vision. We need a lot of carotene to prevent dry eyes, and accelerate the production of visual purple. In addition, when the carotene enters the human body, it can be quickly converted into vitamin a. it is known that all adequate vitamin supplement that will help us prevent and nyktalopií. Therefore, they often eat Carrot in our everyday life.

Green tea contains catechin in abundance. You can effectively resist the Catechin oxidation for us. This means that we can make enough to resist oxidation of catechin in the eyes of the drink green tea. And so we can effectively prevent the occurrence of cataract and glaucoma.

Orange contains rich vitamin c. Crystallization of foreign molecules in the eyes may cause blurred vision. If we add vitamin c shall apply mutatis mutandis in our daily life, we can effectively resist the crystallization of foreign molecules and prevent blurred vision. Generally speaking, women need 75 milligrams of vitamin c every day, and men need 90 mg.

In addition, we can also eat delicacies like pork liver, pumpkin and lean meat to protect our eyes and improve vision. Pork liver contains of vitaminin abundance. We perceive a lot of vitamin a can maintain normal function of the cornea and reinforce our vision in the dark. Therefore, many common foods protect eyes for us. We may not always be selective in our everyday life.

Wang Xueqin is freelance for the web, e-commerce applications in chemistry. LookChem.com is just the place for you to find the chemicals! Our LookChem provide the most favourable conditions for international buyers and let those interested to use all of the entrepreneur.


View the original article here

Keratoconus Vs astigmatism

It is important to understand the difference between an astigmatism, keratoconus, and when you're looking for the right eye wear. If the soft contact lenses does not remove the problem of vision, the perpetrator may be astigmatism. Astigmatism is defect of the eye or lens, which is caused by a deviation from the spherical curvature. Defect prevents the rays of light from the meeting at a common focus, resulting in distortion. If you feel that it may have an astigmatism, rigid gas permeable (RGP) lens, it may be a better solution for you.

Keratoconus is a condition of the eye that can be normally circular in shape, the dome of the cornea thin, overtime as a bulge causing the Cone in place. If you feel that it may have keratoconus, the first step to correct the problem should be a mapping of the surface of the cornea, did. Corneal topography is irregular area on the front of the eye, preventing the lens Assembly correctly.

What is a hard contact lenses?

Soft contact lenses only lies on the cornea of the eye and the irregular surfaces such as rigid gas permeable lens fit. If you have keratoconus, rigid lens is necessary because it provides a perfect shape, the shape of the eye of the dome for football. As a result, that the light is able to concentrate on the back of the eye, giving the wearer more excellent vision as opposed to soft contact lenses.

Some patients are turned away from the rigid gas permeable lens, because they are worried about putting solid hard lens in the eye of fear that will hurt or scratch. First, it is more important in the eye of the rigid lens, so it takes a little more time to adapt. Rigid gas permeable lenses are, however, breathable, safe and deposit resistant than soft lenses.

Advantages of rigid gas permeable lens (RGP)

Rigid gas permeable contact lens is ideal for patients who have two different eye prescriptions, which is a condition called anisometropia. Status causes one eye to obtain the size of a different image than the other. RGP lenses Cut the distance, so the size of the image is more similar between the eyes.

Combine soft and hard lenses for optimum vision

For the improvement of the comfort with RGP for keratoconus is a soft contact lens wear sometimes under him. In this way, the patient feels soft lenses against their eyes and still has the Visual benefits of rigid lens. This technique, known as "piggybacking". Another type of lens used is a hybrid, where the RGP contact lens is soft edge or "skirts" to her. This allows for better comfort and crisp vision. The third technique uses the scleral lens which is bigger RGP, which covers the white part of the cornea and the sclera of the eye or. The size of the large lens wear may seem impossible, but because of the border from the edge of the lid, not felt with each blink.


View the original article here

Overview of colored lenses for sunglasses

In our daily life we are exposed to potentially harmful radiation produced called the UV rays of the Sun. Many people know about the typical rules are outside and what is the best protection against UV radiation, such as the wearing of high sun tan lotion, SPF, for example. But did you know that solar glasses is also an important part to make sure that neither of the victims on the effects of the Sun?

Many people regard their glasses exclusively in terms of comfort and style, but it is not their main purpose. We all drive at some point in our lives when the Sun is directly in the face, and even folding visor can come to the rescue. So why does it hurt so bad on the corner of Sun? UV rays in sunlight actually burn my eyes, when they come into direct contact with them. Therefore sunglasses are necessary, because they create a barrier that allows you to operate your activities at the same time provides a barrier against the harmful UV rays of the Sun.

All the glasses are, however, just created. The specific lenses are manufactured for many different activities and the environment you the best protection in the case where you are and what you do. Different levels of protection is reflected in the color of the lenses that you have.

Yellow lenses are integrated into the sunglasses, which are created specifically for activities such as mountain biking, shooting and cross-country skiing. These lenses can also be used for the driver, and tennis, to name just a few examples. The purpose of the yellow tint is to filter all the scattered blue light, which improves the color contrast provide the Visual effect of a very clear and sharp.

Blue lenses were invented for a different purpose. During the 2000 tennis French Open got blue lens sunglasses players, and a line of men, so as to be easily visible white lines. The only purpose of the blue lenses is to provide a contrast, that filters out light from any visible white light. Although originally created for tennis, these lenses are also recommended for winter sports.

Gray lenses, are among the most common variety of colored Glass sun lenses. Grey tint helps evenly distribute all colors. The color is enough light for it, so that the negative impact of their visions, but dark enough to give a lot of glare protection. Gray lens is generally very useful to anyone who needs a pair of generic glasses for most day-to-day activities.

Purple lenses are used to increase white balance with the environment. Almost the same amount as the ability to contrast the blue lens, provides the advantage of enriching white surroundings. Purple lenses are used primarily in the sports on the snow

The brown colored lenses can be either a darker shade of brown or orange color. The uniqueness of this lens is that it has the ability to block all stray light, as it is, for example, you might find on a cloudy day. While other colors protects against UV radiation, to some extent, Brown lens provides a level of protection. These lenses are particularly useful for fishermen, boaters, and individuals who live in areas where the weather is constantly changing.

About MatrixEyewear.com

Matrixeyewear.com matrix sunglasses were sold from the movie the Matrix, the Matrix Reloaded and the Matrix Revolutions, since 2003, including Morpheus glasses, Neo Agent Smith goggles, glasses and more.


View the original article here

Ageing lens and classification of turbidity

The primary function of the crystalline lens is to the transmission of incident light and the focus on the retina. This requires that the lens is a transparent, condition, which is highly dependent on the regular holding of cells of the lens and a high degree of protein in the cytoplasm of the lens. The concentration of protein in the cells of the lens fibers, which is an extremely high refractive index significantly higher than in surrounding fluids and so allows the lens refracts incident light. Cataract occurs when the lens loses the transparency of the variance, or absorbing light, so that is at risk of Visual acuity. Cataracts may be due to genetic, metabolic, nutritional and environmental insults, or may be secondary to another disease of the eye, or system, such as diabetes or retinal degenerative diseases (see box). By far the most important risk factor is age; relating to the ageing of the cataract is the great majority of all turbidity and the problem of public health, which are all over the world. In developing countries where limited availability of equipment for surgical, relating to the ageing of the cataract is the leading cause of blindness. Because there is currently no effective-surgical therapy for cataract, the problem is expected to increase in size in the coming decades as the world population becomes progressively older.

Causes of turbidity

-The Ageing Of The

– Inheritance

-Metabolic Disorders, for example. Lowe syndrome, hypocalcaemia

-Diabetes

-The toxicity, for example, for drugs (steroids, amiodarone), chemical, metal ions

-Nutrition

-Natural dehydration

-Trauma

-Radiation

-Eye diseases, for example. glaucoma, uveitis, post-vitrectomy

– Systemic illness, for example. atopy, renal failure

Lens growth

Although the lens grows in the course of his life, none of the cells. Part of the cells are added to the lens, as time goes by, with those in the Centre are as old as the individual. The lens grows by adding regular fibres lens weight. The pace of growth is not uniform throughout the length of human life, and it seems that the maximum of the fruit of life. A Fetal lens mass increases by about 180 mg/year (the lens mass is 90 mg at birth), but the growth rate is declining significantly after birth and is 1.3 mg/year between 10 and 90 years old. Estimates of density, the diameter of the lens indicates that the protein content remained relatively constant at around 33% wet weight above the age range. The dimensions of the lens to change complex manner, as the lens is growing. In foetal youth lens is almost perfectly, but from birth in sagittal profile is an ellipse of Equatorial growth outstrips economic growth in the sagittal plane. On the birth of Equatorial lens diameter is about 6,5 mm, while the sagittal width is about 3 mm. in the age of 90 years it becomes about 10 mm in the Equatorial plane and 6 mm in the sagittal plane.

Classification of turbidity

It seems that the three main types of aging nuclear, cortical cataracts and rear subcapsular, which differ both in the place in which the opacity is initially and could be the basis for pathology. Many risk factors can be common for all three types of aging, cataracts, and although turbidity often begin as pure type, like ripe usually become mixed turbidity. The main types of cataracts in clinical practice are summarized in the box below. An objective classification schemes (see box) using photographic standards divide each main type into classes. These classes are based on the density and color (in the case of kernel), or according to the anatomical area of cataract (cortical Prior and posterior subcapsular area). One directly compare patient lens, as the slot the lamp with a photographic copy of the standard classes, as in the various classifications (clinical grading), or it may have one photo of the lens is to study and later class photos according to the classification scheme (photographic grading).

Types of cataracts

-Cortical

-Nuclear

-Rear subcapsular

-Mixed

-Mature, and hypermature

-Capsular

-Front subcapsular

– Retrodots

– Congenital and juvenile total or partial

-Traumatic

An objective classification schemes for turbidity

-The lens cover classification system II, and III (Sociedad Unión II and III)

Cataract classification system – Oxford

-Beaver Dam eye study

Of age related eye disease Study (AREDS)

According To Dr. Adam Adel
Visit the web site for additional notes about ophthalmology
http://ophthalmologynotes.blogspot.com/


View the original article here

Senin, 20 Juni 2011

Candlestick tips to avoid eye strain

Technology has provided us with a lot of gadgets, which offer our sense of sight with the living imageries, which may work related or simply for entertainment pleasure. Televisions and computer monitors, for example, to win every time, when we struggle to focus our eyes on them-they get our precious attention and in return get eyestrain. The usual symptoms are headaches and itchy eyes. Exempted from these by simple tips to prevent eye fatigue, which are below.

Whereas that computers, mobile phones and the like are already part of your lifestyle, at home or in the Office, a break in their use is the simplest way to give their eyes a well-deserved rest. Resting your sense of sight does not necessarily mean closing by changing the view is more than enough.

If you have worked long hours at the computer monitor or watching a marathon of your favorite soap opera, search, or stare somewhere else certainly frees up your tired muscles of the eye.

Building strong muscles also help prevent eye strain. Performance optical muscles is very easy and does not take too much of your time. Just close your eyes tightly for a few seconds and open it slowly. It may be repeated four to five times. It may also be combined with deep breathing. In addition, the damping closed eyes with hot washcloth can be added relaxation effects.

Staring at the bright monitors, and super small text reading on the eyes. Are you gonna do eyes big favor dimming the screen contrast page setting of the computer, and then view the percentage increasing the text size, font, or if you have something more to read on the screen.

Non glossy screen and covers with an anti-glare screens are considered as simple breaks to do anything with your tired eyes. The location of your computer screen at an angle of 90 degrees to any light source can reduce harmful glow. Anti-glare glasses eye could be very useful.

If you experience dry eyes after staring at your computer screen or TV or doodling with one of the electronic gadgets for a long time, trying to blink your eyes all the time. Blinking eye fluids, can help create the eyes you will lose what they r very tired and itchy. Blinking the eyes feel comfortable, not the use of certain eye drops, which you can update your eyes.

Tired eyes is part of our daily life. However, keep in mind, and practicing the habits you prevent fatigue eye torture your sense of sight.

Discover ways to fight off computer fatigue my eyes.
Visit the http://www.buycomputerreadingglasses.com/ in the us.


View the original article here

What can be expected during LASIK?

When you have decided to continue with the cornea, can overcome your nervousness become informed about what you can expect during the operation. Prepare, physically and mentally, will be more easy when the day comes to your eyesight be corrected.

Talking with your doctor before surgery

The surgeon you are working with the effort to go through the whole procedure. The consultation your doctor tell you all about the surgery and what you can expect. In most cases it will take 15 minutes. The events before and after the operation will be the longest part of his time in the Centre of surgery.

If you have a recipe that is larger than many other patients, you must understand that the procedure can take longer. The doctor will have to take more time to complete the process of operation LASIK for sure that is the optimum vision.

Brings an

It's a necessity to anyone you want from the procedure and given that you won't be able to open his eyes, after the completion of the procedure. Your doctor will provide you with eye shields, so that you can give your eyes a break, and so that the healing process can begin. If the permissions of your chosen surgeon, Member of the family or friend could perhaps be with you when the procedure is performed.

Calm with a sedative

Certain patients may be very nervous before the procedure. Most doctors may provide you with a mild sedative, which may be adopted before the start of the cornea. This ensures that you stay relaxed, before and during the operation. It can also help you sleep, when it is terminated.

Understanding that you will be awake during the operation

The operation finished correctly will have to be awake throughout. The procedure is relatively painless. Eye drops are used it will numb the eye, in order to prepare them for the procedure. LASIK employee will for the whole procedure.
After the surgery

It is not for some patients to obtain a substantial improvement in function of the eye right now. In other cases, the patients will have a gradual improvement in their eyes. Before leaving after the surgery, the medical staff will check that you correctly respond to treatment. You will need to provide for pain medication, if you want to. You also receive eye drops and other Council.

Events after the recommendation of the Surgery: Eye Care

It is important to use your eye shields and follow recommended restore plan to achieve the best possible results. Also you must try to attend all the subsequent events, how your doctor must verify the progress of your recovery.

Eye cornea may be less stressful if you are familiar with the process. If you are unsure of anything, please make sure to discuss these questions with your doctor before the operation.

If you're looking for the surgeon knowledgable Dallas LASIK eye, visit the Carter eye Center reviews and a meeting with Dr. Harvey Carter.


View the original article here

What is the PresbyLASIK?

PresbyLASIK (also known as multifocal LASIK) is a laser eye surgery, which can help patients achieve clear vision at all distances. "Presby" in the title refers to the "Presbyopia," progressive loss of reading vision, which affects people over 45 years. "LASIK" in the title refers to the traditional LASIK, laser surgery, which is used to treat myopia, Hyperopia and astigmatism. As a blending of these two words suggests presbyLASIK treatment of Presbyopia together with Visual problems, have traditionally treated with LASIK.

Until recently, was the only treatment for Presbyopia corrective eye-glasses. However, there are several new treatments available today, including the exchange of refractive lens with premium intraocular lenses, multifocal contact lenses and LASIK monovision. This treatment is laser-eye, in which one eye is corrected for distance, and the other for reading vision.

PresbyLASIK is considered the next-generation treatment and has the potential for being overtaken all currently available Presbyopia treatment. It is available in Canada and in other parts of the world, but has not yet been approved by the Food and Drug Administration for use in the United States.

Read on for more information, how it works and how the PresbyLASIK differs from monovision LASIK.

How does it work?

PresbyLASIK is working to change the shape of the cornea. Unlike traditional LASIK, which improves the vision in only one distance, improves the presbyLASIK the vision in several distances. This can be done by creating multiple power zones on the cornea for near, intermediate, and distance. It's similar powers in Presbyopia glasses. The difference is, however, that the PresbyLASIK "implants" these powers in my eye. The patient does not require glasses, because the eye itself provides the same (or better) focusing powers.

How is different from the Monovision LASIK?

Both methods of treatment of Presbyopia is monovision LASIK PresbyLASIK and. They use laser energy, and both the shape of the cornea in the eyes. However, this is where the similarity ends. Monovision LASIK corneal shape changes, one way that supports clear near vision and the rest of the cornea in a manner that supports clear distance. The idea is that, over time, the brain learns to combine the images seen by each eye, and the result is a sharp vision at all distances. In practice, however, the brain is often difficult to combine images, and the result is blurred vision, or even double vision.

PresbyLASIK works otherwise. It changes the shape of both corneas in the same way. Therefore, multiple zones vision are generated on both of the cornea. The brain has to learn something new, because it's bringing more zones as seen through glasses ophthalmic or progressive.

When will it be available in the United States?

While the PresbyLASIK clinical trials, it is hard to tell when the FDA will grant its consent, and for what types of patients. Patients interested in PresbyLASIK, currently can obtain this procedure write in a clinical trial, or to travel to another country. This is similar to what happened during the development of satinského laser eye. For example, PRK, LASEK and Epi-LASIK were all first approved in Europe and later received approval for use in the United States. Similarly, many modern treatments for cataracts were first available only in Europe. This trend suggests that it may finally obtain the approval of the PresbyLASIK the FDA and become standard procedure in the United States.

For more information about Surgery LASIK, PRK, LASEK, Epi-LASIK or cataract treatment, visit Los Angeles, Dallas, or Boston cornea provider.


View the original article here