Posts Tagged ‘retina’
Lasik is getting very popular lately to correct for refractive lens problems such as short sightedness, long sightedness and astigmatism. However, before you join the crowd blindly and go for Lasik, weigh the pros and cons first. This is called taking an informed decision. Understanding the basics of Lasik will enable you to choose the best options to correct your eye sight.
You have a natural pair of lens in your eyes that you are born with. Those of you who are fortunate will have very little problems with this set of natural lens. However, some of you may have defective lens, causing blurred images to be received by your eyes. These blur images resulted because the light reflected from external images cannot be focused correctly on your retina. Short sightedness and long sightedness are due to under or over focus of the images on your retina, while astigmatism is due to uneven focusing of images on your retina.
Lasik can help to repair the focusing of images with your natural lens, as it uses laser that can target specific tissues or muscles very precisely for repair. However, Lasik, being an artificial means, also brings with it a certain amount of risks and costs for the procedures, and pre and post consultations. I used to wear eye glasses for short sightedness, but have threw away my glasses several years ago. No, I did not go for Lasik, but instead opted for low cost, safe and natural means to improve my eye sight.
I now have perfect vision in my right eye, and near perfect in my left. I have searched for natural ways to improve my vision, and have found one that actually works for me. Do check out the scientifically proven, natural and easy way to improve your vision, without burning a hole in your pocket. Go to the website http://health11.info for more information.
Jim Kirk has always been interested in natural healing, and has researched on multiple topics in this area. He is a much sought after public speaker and a writer. He highly recommends the natural healing methodology at http://health11.info to recover your vision naturally and easily with a scientifically proven trademarked method.
http://ezinearticles.com/?The-Pros-and-Cons-of-Lasik-Surgery&id=3590260
Article Source:http://www.articlesbase.com/vision-articles/the-pros-and-cons-of-lasik-surgery-1771277.html
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A retinitis pigmentosa or retinitis pigmentosa(or retinitis pigmentosa, retinopathia pigmentosa, RP) is a genetic disease that attacks the retina causing destruction of their cells. The patient has the disease gradually loses the sight First night vision after vision even during the day. The loss of perception of colors and shades in contrast also gradually affects the patient.
Retinitis pigmentosa (RP) is a group of inherited diseases of the retina (it is structure of the Eye) that all lead to a gradual progressive reduction in vision. Difficulties with night vision, sight and peripheral vision are the first things that are noticed. Later, reading vision (detailed vision) and color vision are affected and exaggerated. The age at which symptoms begin is variable and may vary with the different hereditary and genetic types (Genetics and Retinitis Pigmentosa). The time and rate at which vision deteriorates is variable but is generally very slow with changes occurring over years rather than months. In approximately half of all cases (50 to 60%) there are other family members with RP. There are main three most important inheritance patterns, autosomal recessive, autosomal dominant and X-linked inheritance, depending on the genetic cause (Genetics and Retinitis Pigmentosa). Retinitis pigmentosa mainly affects approx 1 in 3,000 to 4,000 people.
Retinitis pigmentosa (RP) is a group name of hereditary eye disorders. These disorders have an effect on the retina, which is the inside layer light-sensitive tissue, lining the back of the eye, in which the first stages of seeing take place. In RP, sight loss is slow and gradual but progressive. It is abnormal and unusual for people with RP to become totally blind as most retain some useful vision well into old age.
Causes of Retinitis pigmentosa (RP):
It is currently known that there are many different inherited problems causing RP. In all Retinitis pigmentosa (RP) -associated conditions however, the ability of the retina to respond to light is affected. The problem can be in numerous parts of the retina such as the rod or cone cells, or in the connections between the cells of the retina.
Symptoms of RP
The most common first symptom is difficulty in seeing in poor light, for example outdoors at dusk, or in a dimly lit room. A second indication is reduction of the visual field, in which view is lost from the sides, or from above and below. This is frequently referred to as tunnel vision and means that the rod cells, and several of the outer cone cells, have been affected first.
In some Retinitis pigmentosa (RP) – associated conditions central vision is lost first. The first signs of this are complicated in reading print or carrying out detailed work. All Retinitis pigmentosa (RP) conditions are progressive, but the speed at which deterioration takes place varies from one person to another.
In various types of Retinitis pigmentosa, glare from bright lights is an increasing problem and trouble, although some people do not experience this until the more advanced stages.
There is no hard and fast rule, but in most cases the early symptoms of Retinitis pigmentosa increase and develop between the ages of 10 and 30.
Retina Pigmentosa. Read more information on remedies for eye disease.
Article Source:http://www.articlesbase.com/vision-articles/retinitis-pigmentosa-a-genetic-disease-1649178.html
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Myopia is commonly known as nearsightedness. It means you have difficulty seeing things that are far away. With myopia you can see clearly up close unless you have another condition that affects your close vision, such as presbiopia or astigmatism. Most myopia begins in childhood, but some factors can cause myopia to develop later in life. In adults, myopia can be corrected with laser eye surgery including LASIK.
Myopia and Your Cornea
Your cornea bends light as it enters your eye. A properly shaped cornea focuses that light on the retina. If you are nearsighted your cornea is either too curved or your eye is too long, causing the light to focus in front of the retina. When the light reaches your retina it has started to spread out again and the image is blurry.
Eyeglasses for nearsightedness have concave lenses. This spreads out the light before it reaches the cornea, so it travels farther back in the eye before it is focused.
Laser vision correction reshapes the cornea so it can focus the light properly on the retina.
What Causes Myopia?
Nearsightedness is the most common of all vision problems and affects about 30% of Americans. In the last few decades it has become more common throughout the world. The causes of myopia are uncertain, and the subject has become quite controversial.
Heredity seems to play a large role. Children of myopic parents are more likely to be nearsighted.
Lifestyle may contribute to myopia, as well. Long periods of close work, such as reading, looking at the computer screen, and possibly even watching television, may affect how a child’s eyeball develops as they grow.
It is also believed that a diet high in simple carbohydrates increases your chance of developing myopia, due to too much insulin circulating in the bloodstream (hyperinsulinemia). Hyperinsulinemia is also common in people with type II diabetes and insulin resistance. Late developing myopia is sometimes an early warning sign of diabetes risk and can eventually develop into cataracts.
Complications of Myopia
For most people myopia is an inconvenience, but relatively harmless and easily corrected with glasses or contact lenses. If corrective lenses are too much of a hassle, laser eye surgery is an option as well.
However, myopia can lead to more serious eye conditions, vision loss, and even blindness. People with myopia have an increased likelihood of developing glaucoma and retinal detachment.
Correcting Myopia
Typically, your eye doctor will prescribe glasses and/or contact lenses to correct your vision. Eye exercises can help improve your vision, especially when eye strain from close tasks such as long hours of computer use is a factor.
Laser vision correction can allow you to see clearly 24/7, without the hassle of wearing glasses or contacts.
If you are nearsighted and would like to learn more about improving your vision, please visit Eyes.com today and find out if you are a candidate for LASIK.
Article Source:http://www.articlesbase.com/vision-articles/myopia-1600072.html
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One quarter of all people in the UK aged over 75 will develop cataracts and after the age of 50 your chances of having cataracts really begin to increase. A cataract causes damage to the eye lens and the only available treatment to restore vision damaged by cataracts is the removal of the cataract and the damaged eye lens. Cataract surgeons then replace the natural eye lens with an intraocular lens to restore vision.
What is a cataract and what causes cataracts?
A cataract damages the eye lens, distorting the way light enters the eye and causing vision to become cloudy.
The eye lens works like a camera: light enters the eye and is sent in a clean line backwards through the eye to the retina. From the retina, electrical images are sent to the brain and these images are what we see.
When the eye lens becomes clouded by a cataract, light defracts as it enters the eye, sending fractured images towards the retina. The images we see become distorted or ‘cloudy’.
Cataracts are caused by a build up of proteins in the eye. These proteins gradually clump together and damage the eye lens. The longer a cataract is left untreated the more proteins that cloud the lens and the more damaged vision becomes.
Cataracts area common problem for people over the age of 50 – with 1 in 4 UK patients developing a cataract in a lifetime. Cataracts develop gradually with age but can also be caused by damage to the eye or as the result of a genetic problem in the case of congenital cataracts.
Different types of cataract can damage different parts of the eye lens and more than one cataract can develop at once. Cataracts commonly occur in both eyes at the same time.
What are the symptoms of a cataract?
The most common symptoms of cataracts are blurred or cloudy vision, difficulty in seeing bright colours, seeing halos or glare around bright lights and poor night vision. Cataracts symptoms will vary according to the type of cataract. As the cataract develops, symptoms of blurred, cloudy vision will increase and vision deteriorates.
How do cataracts develop and progress?
Once a cataract starts to develop, the condition will get worse over time. The speed a cataract develops will vary between patients but the more advanced a cataract becomes the more damage is caused to eye sight.
How are cataracts diagnosed?
Cataracts must be diagnosed by a qualified opthalmologist. The symptoms of cataract may be similar to those of another eye condition and it is important patients have a consultation with an eye clinic before booking cataract operations online.
To diagnose a cataract the opthalmologist will perform a series of eye tests: a visual acuity test, pupil dilation test and a tonometry test. These tests can diagnose a cataract in the very early stages of cataract development which is why regular eye tests are strongly recommended, especially for people aged over 65.
What is recovery like after cataract surgery and what results can I expect?
Cataract surgery is performed as an outpatient operation. The surgery is complete within one hour and patients are able to return home the same day.
Immediately after cataract surgery, vision will be blurred due to the eye drops used to dilate and numb the eye for surgery. Patients are generally prescribed eye drops to protect the eye from infection as it heals and the new replacement lens settles in the eye. It is important that patients try to avoid irritating the eye until fully healed and waering an eye patch while sleeping can prevent rubbing the eye and causing a problem.
The recovery from cataract surgery is fast – most patients feel only a slight ache in the eye for one-two days post-surgery.
The results of cataract surgery are excellent with 95% of patients reporting an immediate improvement in their sight*. Patients can expect an end to blurred vision, annoying glare and halos from bright lights and an improvement in night vision.
What are the risks and complications of cataract surgery?
As one of the most commonly performed ophthalmology procedures, cataract surgery enjoys a very low complication rate and the surgical risks are low. However, as with all surgery it’s important to understand the risks and complications surrounding cataract surgery to help you make appropriate arrangements for the recovery period.
Frequently asked questions about cataracts
Will you be able to see or feel anything during cataract surgery? How long will the new lens last? You can find the answers to the most often asked questions about cataracts and cataract surgery by visiting our cataract FAQ page.
*statistics from NHS Choices
Article Source:http://www.articlesbase.com/vision-articles/cataracts-and-vision-loss-1583882.html