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Just like a camera, the eye has a lens (called the crystalline), which focuses light on the retina to create images. Cataracts are a gradual clouding of the crystalline. When not enough light gets through the eye, the images become blurry or fuzzy. Vision problems get worse as the disease progresses. In more serious cases, people can only detect changes in light.
Cataracts generally cause a gradual decline in vision over a number of years. They often affect each eye to different degrees. Cataracts occur most often in people over the age of 50. Cataracts are responsible for an estimated 16 million cases of blindness in the world, and half of these cases are found in African and Asian countries where surgery is less accessible.
We don’t know for sure why cataracts form, but aging is known to be the most common cause. Other possible causes of cataracts include:
Cataracts in children are rare, but they can be a complication of conditions like Down syndrome (trisomy 21) or the result of an infection (such as rubella or genital herpes) that is spread from the mother to the fetus.
Below are the main symptoms and signs of cataracts:
Cataracts don’t cause pain. If you notice any symptoms, you need to consult an optometrist to get your vision checked.
Although aging is the most common cause of cataracts, other factors can increase your risk of developing them: smoking, UV rays, alcohol abuse, and malnutrition. Although we don’t yet know if cataracts can be prevented, you can take the following recommended precautions to try and reduce your risk:
Mild vision problems caused by cataracts can be corrected with glasses or contact lenses. But if the disease gets in the way of your daily activities, cataract surgery is the only possible treatment. No medications can treat cataracts.
To perform the surgery, a doctor will use an ultrasound device to remove the lens before replacing it with an artificial one. This is a short procedure that doesn’t require a hospital stay. You'll quickly regain your vision after the surgery, but you’ll need to take some precautions. For example, you should wait 2 weeks before playing sports or putting on eye makeup.
Although the success rate of this surgery is high, complications can occur, such as an infection or hemorrhage. Surgery outcomes are also not fully guaranteed. In 20% to 30% of cases, the lens capsule, or the membrane supporting the artificial lens, can also become cloudy and blur your vision. Fortunately, laser treatment generally restores vision quickly in this case.
For more information about cataracts, don’t hesitate to consult your pharmacist, who is here to answer your questions.
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The information contained herein is provided for informational purposes only and is not intended to provide complete information on the subject matter or to replace the advice of a health professional. This information does not constitute medical consultation, diagnosis or opinion and should not be interpreted as such. Please consult your health care provider if you have any questions about your health, medications or treatment.