Although cataracts do not cause irritation or pain, it is the most common cause of blindness in the world. Fortunately, it is treatable with safe, effective surgery.
cataract is a condition in which the lens of your eye turns cloudy, preventing sufficient light from entering your eye, therefore reducing vision. Eventually, this deterioration in vision will interfere with your daily activities, such as reading or driving a car (particularly at night).
Most cataracts develop slowly and you may not notice it in the earlier stages of the condition. However, your vision will be aff ected as the clouding progresses.
Cataracts are not dangerous to eye health unless they become completely white. This condition, called an overripe or hypermature cataract, can cause raised eye pressure and present suddenly with redness and pain in the eye, as well as headaches. If a cataract causes infl ammation and raised eye pressure, it will need to be removed.
Cataract formation is associated with ageing and is common in the elderly. In young people, it can be congenital, associated with inflammatory eye disease or due to injuries.
Other risk factors include prolonged UV light exposure, long-term use of certain medications and medical conditions such as diabetes.
The first sign that you may have a cataract is if you have blurred vision that cannot be corrected with the usual corrective visual aids such as glasses. You will experience the need for frequent change of glasses, colours appearing dull, poor vision in bright light, halos around lights, difficulty in reading, watching television or driving at night.
Signs and symptoms of cataracts include :
Everyone is at risk because age is the greatest risk factor. Your risk of developing cataracts increases with :
There is no scientifically proven prevention. However, these tips will help prevent cataracts :
Cataracts cannot be cured with medications.
Lifestyle adjustments such as changing your spectacle power, using a magnifying glass to read or improving the lighting in your home can be adopted in the earlier stages of the condition.
Cataract surgery is required when the condition starts to interfere with your daily activities. It is a painless, safe and eff ective surgery. During the procedure, the clouded lens is removed and replaced with a clear lens implant.
The cataracts are rarely removed without the need to implant new lenses. In these cases, vision can be corrected with aids such as glasses or contact lenses.
Cataract surgery is performed as a day surgery without general anaesthesia but with topical anaesthesia.
Most cataract surgeries are performed using a technique called phacoemulsifi cation which does away with the need for stitches. The procedure involves making a small incision of 1.8 to 3mm on the cornea. A vibrating instrument is then introduced into the eye through this incision. This process causes emulsifi cation (i.e. softening) of the clouded lens, which is sucked out through the instrument. The capsule of the lens is left behind to receive the lens implant.
There are various types of intra-ocular lenses (IOL) available. Discuss with your doctor about the most suitable type of lenses for you.
2. Advanced Monofocal
Monofocal lenses in both eyesThe full distance correction in both eyes will benefi t those with an active sports/ outdoor lifestyle.
Monovision using monofocal lenses The IOL power is chosen to provide :
This will allow most patients to be spectacle-independent for most activities. They may still need reading glasses when reading for prolonged periods of time. Not all patients are able to tolerate monovision lenses and depth of vision may be reduced.
Suitable for those who :
For best results, these lenses should be used in both eyes.
Multifocal lenses offer :
After surgery, some people may notice :
These symptoms are temporary in most cases and are less likely if both eyes have these lenses.
Multifocal Toric IOLs
These are also available today. These IOLs provide for near/intermediate and distance vision just as other multifocal IOLs with their attendant side eff ects, but in addition incorporate the astigmatism correction.
For best results, this lens should be used in both eyes.
Accommodative lenses offer :
After surgery, some people may:
Your choice of lenses depends on your lifestyle. Keep in mind that they should improve and enhance your overall vision.
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