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Cataract: Causes, Detection and Treatment. by suraj kumar

A cataract is a cloudiness of the eye's natural lens, which lies between the front and back areas of the eye.Vision through a 'cloudy' less transparent lens is blurry and is quite like looking through a misty glass or looking from behind a 'waterfall'.

No one knows for sure why the eye's lens changes as we age, forming cataracts. Researchers are gradually identifying factors that may cause cataracts â€" and information that may help to prevent them.

Many studies suggest that exposure to ultraviolet light is associated with cataract development, so eye care practitioners recommend wearing UV sunglasses and a wide-brimmed hat to lessen your exposure. Other studies suggest people with diabetes are at risk for developing a cataract. The same goes for users of steroids, diuretics and major tranquilizers, but more studies are needed to distinguish the effect of the disease from the consequences of the drugs themselves. Some believe that a diet high in antioxidants, such as beta-carotene (vitamin A), selenium and vitamins C and E, may forestall cataract development. Meanwhile, eating a lot of salt may increase your risk.

Other risk factors may include cigarette smoke, air pollution and heavy alcohol consumption. A small study published in 2002 found lead exposure to be a risk factor; another study in December 2004, of 795 men age 60 and older, came to a similar conclusion. But larger studies are needed to confirm whether lead can definitely put you at risk, and if so, whether the risk is from a one-time dose at a particular time in life or from chronic exposure over years.

If a person develops Cataract only treatment for Cataract is Cataract Surgery.The modern techniques do not require the cataract to mature & ripen for the decision of surgery. Whenever, the cataract happens to interfere with your lifestyle that would be the time when the surgery should be planned out. By lifestyle is meant when you feel that you are having problem or difficulty in carrying out your personal & professional visual needs to your requirements that should be the time when surgery should be opted for. For example, if you are unable to drive safely because of cataract formation it would be wise to have them removed. Some patients may need cataracts removed for medical reasons; for example, if a patient is diabetic and the cataract is interfering with the ophthalmologist's examination of the retina, then it may be recommended to the patient to have the cataract removed.

To remove Cataract a small incision is made into the eye. Dr. Rohit Om Parkash uses an ultrasound machine {INFINITI VISION SYSTEM} wherein torsional emulsification is used to break it up, and then remove it. The back membrane of the lens (called the posterior capsule) is left in place. Usually, a replacement lens called an Intra Ocular Lens is used.

symptoms of Cataract:

A cataract starts out small, and at first has little effect on your vision. You may notice that your vision is blurred a little, like looking through a cloudy piece of glass. Colors may not appear as bright as they once did

The most common symptoms of a cataract are:

Cloudy or blurry vision. Problems with light, such as headlights that seem too bright, glare from lamps or very bright sunlight. Colors that seem faded. Poor night vision. Double or multiple vision.

Frequent changes in glasses or contact lenses.

If you notice any of the symptoms described previously, go to have an eye exam. By performing it, the Ophthalmologist will know if you have a cataract. Your eye doctor will perform a thorough examination of your eyes. Glare testing and contrast sensitivity tests are sometimes used. There is no single objective test to determine a need for cataract surgery. The final decision for cataract surgery is made by the patient and depends on how much the decreased vision from the cataract is bothersome.

For More Information or Quick Appointment for CATARACT SURGERY, you must visit http://www.accuratesight.com.

This website is owned by Dr. Om Parkash Satyam Netralaya, the only institution in North India which is using the latest technology of the â€TORSIONAL EMULSIFICATION†employing 2.2mm incision micro coaxial technique with IQ Intra Ocular Lens {IOL}/ RESTOR multifocal IOL implantation. This is possible because of the installation of INFINITI VISION SYSTEM, which is the most advanced Phacoemulsification unit in the world for cataract surgery. Torsional Emulsification is a much safer & efficient technique than the traditional phacoemulsification technique.

Dr. Rohit Om Parkash is the convener of the â€THE PHOENIX PHACOSURGEONS CLUB’ which is the exclusive group of cataract surgeons in the world who have to their credit documented 30,000 phacosurgeries performed by an individual. Dr. Om Parkash Eye Institute has completed 22 years in Refractive Surgeries. This institute was the first in the country to use for laser correction of specs, the state-of-the-art, Customized Lasik using NAVEX Quest -NIDEK CX III with Pentacam and OPD Scan. Dr. Om Parkash Eye Institute is ideally located in the most posh area of the city, 2.5 kms from bus stand, 1km from railway station and 8kms from airport.

Dr. Om Parkash Eye Institute

117-A, The Mall, Amritsar-143001

(Punjab) INDIA

Tel : +91-183-2221128, 2221132,
6531128, 6541132
Mob: +91-98158-15888
Fax: 0091-183-2220910

http://www.accuratesight.com

Article Source: http://www.earticlesonline.com/Article/Cataract--Causes--Detection-and-Treatment-/573683

Difference between two canon lenses?

What is the difference between the canon Ef 75-300 4/5.6 Ii lens and the Ef 75-300 4/5.6 Iii lens?

The EF 75-300mm lens is available in a (now discontinued) IS version and the III version. Both are budget lenses and neither is a very good lens. A slightly better choice would be the EF 70-300mm f/4-5.6 IS USM (but it still has a number of shortcomings).

To give you an idea of what these lenses are like, here's some excerpts from the reviews below...

"The Canon EF 75-300mm f/4-5.6 III USM Lens is really cheap. Usually you get what you pay for - unfortunately this is the case with the Canon EF 75-300mm f/4-5.6 III USM Lens

Build quality of the Canon EF 75-300mm f/4-5.6 III USM Lens is mediocre

Image quality from the Canon EF 75-300mm f/4-5.6 III USM Lens is also mediocre.

If you care about great image quality and sharp photos, the Canon EF 75-300mm f/4-5.6 III USM Lens is not for you.

Image quality from the Canon EF 75-300mm f/4-5.6 IS USM Lens is mediocre and very similar to the Canon EF 75-300mm III USM Lens. The IS version had slightly more corner softness.

If you care about excellent quality, sharp photos, the Canon EF 75-300mm f/4-5.6 IS USM Lens is not for you" etc. etc.

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