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CATARACT

cataract
 

Cataract is a clouding of the lens of the eye which leads to decrease in vision.Cataract begins when protein in the eye forms clumps that prevent the lens from sending clear images to the retina. The retina works by converting the light that comes through the lens into signals. It sends the signals to the optic nerve, which carries them to the brain. Cataract develops slowly and eventually interferes with your vision.

You might end up with cataract in both eyes, but they usually don’t form at the same time. Cataract are common in older people.

Cataract is the commonest cause of severe visual impairment and blindness being responsible for 45.3% and 43.0% respectively.

 

SYMPTOMS OF CATARACT

COMMON SYMPTOMS OF CATARACT INCLUDE:
  • Blurry vision.
  • Trouble seeing at night.
  • Increased sensitivity to glare.
  • Seeing colors as faded.
  • Halos surrounding light.
  • Double vision in the affected eye.

A need for frequent change in prescription glasses.

CAUSES OF CATARACT

COMMON CAUSES OF CATARACT INCLUDE:

  • Age.
  • Trauma.
  • Smoking and Alcohol.
  • Radiation Therapy.
  • The long term use of steroids and other medications.
  • Ultraviolent Radiation.

TYPES OF CATARACT

There are different types of cataract. They are classified based on where and how they develop in your eye.

  • Nuclear Cataract form in the middle of the lens and cause the nucleus, or the center, to become yellow or brown.
  • Cortical Cataract are wedge-shaped and form around the edges of the nucleus.
  • Posterior Capsular Cataract form faster than the other two types and affect the back of the lens.
  • Congenital Cataract, which are present at birth or form during baby’s first year, are less common than age-related cataract.
  • Secondary Cataract are caused by disease or medication.
  • Diseases that are linked with the development of cataracts includes glaucoma and diabetes. The use of steroid prednisone and other medications can sometimes lead to cataract.
  • Traumatic Cataract develop after an injury to the eye, but it can take several years for this to happen.
  • Radiation Cataract can form after a person undergoes radiation treatment for cancer.

RISK FACTORS OF CATARACTS

Risk factors associated with cataract includes:

  •  Older age.
  •  Heavy alcohol use.
  •  Smoking.
  •  Obesity.
  •  High blood pressure.
  •  Previous eye injuries.
  •  A family history of cataract.
  •  Too much sun exposure.
  •  Diabetes.
  •  Exposure to radiation from X-rays and cancer treatment.

PREVENTION OF CATARACT

To reduce your risk of developing Cataract:

  • Protect your eyes from UVB rays by wearing sunglasses outside.
  • Have regular eye exams.
  • Stop smoking.
  • Eat fruits and vegetables that contains antioxidants.
  • Maintain a healthy weight.
  • Keep diabetes and other medical conditions in check.

TREATMENT OF CATARACT

If you are unable to undergo surgery, your doctor may be able to help you manage your symptoms. They may suggest stronger eyeglasses, or sunglasses with an anti-glare coating.

SURGERY

Surgery is recommended when cataract prevents you from going about your daily activities, such as reading or driving. It is also performed when cataract interfere with the treatment of other eye problems.

• One surgical method, known as Phacoemulsification, involves the use of ultrasound waves to break the lens apart and remove the pieces.
• Extracapsular surgery involves removing the cloudy part of the lens through a long incision in the cornea. After surgery, an artificial intraocular lens is placed where the natural lens was.
Surgery to remove a cataract is generally very safe and has a high success rate. Most people can go home the same day as their surgery.