Eye Care Blog

Diabetes can also lead to eye problems

Added 17/9/2010

Eye problems is not only linked to eyes only, but also some other mental or physical factors. For example, many eye problems can be caused by certain physical diseases, like diabetes. Diabetes can really cause greatly damage to eyes, like diabetic retinopathy, a kind horrible eye problem.

Some surveys have also revealed that people with diabetes run much higher risk than common people in getting eye problems. What’s worse, this problem may be even higher on diabetics of certain groups- people with unusual glucose level; people with bad habits, like smoking and drinking; high blood pressured patients; pregnant women; etc. These people may run much higher risk of getting diabetic retinopathy than other diabetic sufferers.

However, Diabetic retinopathy is often neglected by many people until some unusual symptoms appear. On the whole, sufferers of this problem will find- there are some floaters in their eyes; they may have blurred eyes or discomfort and irritation in eyes; their visor declines greatly and their eyes can work well if light is dark.

Generally, the early and advanced diabetic retinopathies are the two forms of this eye problem. The former type is common and less severe than the later one. It will relatively cause less damage to retina. On the contrary, the advanced type is the most server form and will cause great damage to sufferer’s retina. Or in some cases, it will cause damage to optic nerve.

If people really have diabetes, they are suggested to pay regular visit to eye doctors for certain eye check, so as to make sure that the diseases will not cause damage to vision. Especially, people in the particular group, mentioned above, should pay much more frequent visit. If there is any unusual symptom, just contact the eye doctor for help.

Tags : eye problems
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What is nearsightedness

Added 24/8/2010

Nearsightedness or nearsighted eye is also called myopia. Nearsightedness is self-explanatory in its definition. It is a refractive defect of the eye in which in which nearsighted people can see nearby object clearly but have difficulty in reading and seeing objects at a distance. We know the human being’s eyes have the ability of focusing images of both nearby and distant objects, because the lens of the eyes can assume a large curvature to focus nearby objects and a flatter shape to bring a distant object into focus. When the eyes are not able to provide a long focal length they can’t focus on distant objects, so nearsightedness occurred. Nearsighted problem is very common in youth. It is said that 1/3 of the population is nearsighted. Bad behaviors such as sitting close to the television while watching TV, holding books very near to the face, reading in sun or in a bus can lead to nearsightedness. Some evidence suggests that if one or both parents are nearsighted, their children are more likely to be nearsighted.

Nearsightedness can be determined by eye exam, measuring in diopters by the strength, and the prescription is a negative number, the higher the number is the worse the eye’s condition is. Nearsightedness is divided into three levels by the number, low myopia (0.00 to -3.00 diopters), medium myopia (-3.00 to -6.00 diopters) and high myopia (-6.00 to -10.00 diopters). Nearsightedness can also be divided into simple myopia, degenerative myopia, nocturnal myopia, pseudomyopia and induced myopia by their clinical appearance. Fortunately, nearsighted eye can be corrected by eyeglasses or contact lenses simply. If glasses or contact lenses are not favorable, nearsighted people can choose refractive surgery, such as LASIK and PRK, in which a flap is cut through the top of the cornea by an excimer laser.

Related Articles:

Methods of myopia control in children

Intacs corneal implants for myopia and keratoconus

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Complex structures of an eyeball

Added 11/6/2010

The eye is a very crucial organ of the body. But not all people know detailed parts of an eyeball and how it works. In fact, the eyes are spheres about an inch in diameter. They are self lubricating, self cleaning and well protected. Of course, the fundamental task of the eyes is to focus images entering the eyes. The eyes can further convert the received images into nerve impulses. After that, the optic nerve will send the generated nerve impulses to the brain for final interpretation. The eyes are very sensitive that they can distinguish between images only one ten thousandth of an inch in apart.

The powerful function of the eye comes actually from different structures of an eyeball working together in cooperation. The cornea acts as the window at the front of the eye. This part is responsible for bending or refracting light before it is passed through the lens. Commonly referred as the while part of the eye, the sclera forms the round wall of the eyeball. The iris of the eye is commonly used to describe one’s eye color such as brown or blue. In detail, the iris sits behind the cornea and controls the amount of light entering the eye.

Another element of an eyeball is the pupil, which is the black hole in the center of the iris. In an environment with low light, the muscles of the iris adjust the pupil to open wide or dilate. And the pupil will become smaller in bright light. Sitting behind the pupil, the lens is responsible for focusing light onto the retina. It is a flexible bag of clear protein and surrounded by a thin membrane called capsule or capsule bag. The retain lining the back half of an eyeball registers light images and sends them to the brain through the optic nerve consisting of a bundle of nerve fibers. It is commonly said that the eye works much like a camera. In this case, the retina can be interpreted as the film.

If you want to know more about vision knowledge, then feel free to visit http://vision.firmoo.com/eye-diseases

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