Cataracts and cataract surgery - What you need to know.

Cataracts, and cataract surgery – What you need to know.

What are cataracts?

In fact there are several forms of cataracts and the identification of the different types depends largely on where the opacity is in the lens. Some cataracts develop very slowly, with vision reducing gradually over some years.  Other cataracts will progress faster, sometimes becoming operable in a few months or even weeks.  

The Nuclear cataract

This cataract is most commonly experienced, as we get older.  As we age the lenses in our eyes start to change with a yellowing seen deep in the central nucleus
of the lens that will eventually darken to a brown colour.  The stage of a developing cataract where brown is observed in the lens is called brunescence. This type of cataract will lead to a progressive reduction in the ability to see clearly and may make sufferers see colours tinged with yellow.

The Cortical cataract

A cortical cataract is categorised by white, spoke-like cloudiness observed in the cortex of the lens –the area that surrounds the nucleus.  A cortical cataract will typically begin peripherally and then gradually progress towards the centre of the field of vision.

The Sub capsular cataract

The sub capsular cataract will appear behind the lens and is often flagged up initially by experiencing a glare around bright lights.  Typically sufferers might report a problem with a glare from oncoming headlights.  The condition will eventually progress to a general reduction in vision. The sub-capsular cataract is often found in patents who suffer with diabetes or in patients who are taking steroids in high doses.

How likely is it that I will develop cataracts?

In the UK, over 50% of people who are over 65 years of age are likely to develop some degree of age-related cataracts and for those aged over 85 the percentage rises to 70%.  Although those in the higher age groups are far more likely to get cataracts younger people and babies can also be affected where the condition is known as congenital or childhood cataracts.

As far as gender difference is concerned, cataracts do occur slightly more commonly in women than men. Ethnic background can also be a factor with the age at which cataracts occur being lower in patients from the Indian sub continent.

Considered a relatively minor problem that is easily dealt with in the West, globally cataracts are the number one cause of avoidable blindness. Over fifty per cent of all blindness in the world can be attributed to cataracts and this is a World Health Organisation priority, worldwide.

What is the treatment for Cataracts?

The only way to deal with a cataract is to remove it during cataract surgery.  The surgery will remove the central nucleus of the eye and the lens cortex.  With the removal of the natural lens any opacity, wherever it occurs, will be removed with the extraction of the lens.  

Once the nucleus and surrounding cortex has been removed, the clear surrounding bag of the lens (the capsule) will be left behind. An intraocular lens (IOL) implant will then be placed into the capsule.

The power of the IOL will be calculated so that the patient will have clear distance vision. The lens can also be provided for reading and intermediate vision with a multifocal IOL. Additionally the bifocal and even trifocal IOL options are becoming a popular choice for patients having cataract surgery. 

Can I reduce my chance of developing cataracts by eating well?

Can I reduce my chance of developing cataracts by eating well?

Cataracts often form as we get older and are the major cause of blindness globally.  The only way to deal with a cataract is to remove the clouded lens and replace it with an intraocular lens (IOL) during cataract surgery.

While the precise reason that cataracts form is unclear, experts have concluded that oxidative stress will damage certain enzymes and proteins that are in the eye's natural lens, which will lead to the lens becoming cloudy.

The research has not produced any conclusive results, but eating a healthy diet that is antioxidant rich and includes certain vitamins has, in several studies, been highlighted as indicating a reduced risk of developing cataracts or in those cataracts progressing.

Cataracts, Diet and Oxidative Stress

Oxidative stress will occur when damaging free radicals that roam the body and the antioxidants that keep them in check are out of kilter. Free radicals are atoms or molecules that react with other atoms and molecules because their electrons are unpaired.  

Eating Well for Optimum Eye Health

A diet rich in fruits and vegetables might reduce your risk of cataracts later in life. The free radicals mentioned earlier will damage the body by stealing electrons from healthy cells of tissues and organs. This process is called oxidation.

Oxidation in the eye affects proteins and fats in the lens, damaging and clouding the lens - a cataract is created. Preventing damage from free radicals by eating healthy foods, concentrating on those that contain antioxidants, is thought likely to slow this process down.

The free radicals that cause damage to our eyes and to the rest of our bodies commonly arise from:

·      Eating unhealthy foods

·      Exposure to pollution or chemicals

·      Smoking

·      Ultraviolet light

Some free radicals, however, will occur from regular daily metabolism, meaning that even people without specific risk factors need the antioxidants that are found in healthy foods.

Which Healthy Foods Prevent Cataracts?

Those who consistently eat a healthy diet will include colourful fruits, vegetables and helpings of whole grains.  There is some evidence that this might result in a decreased risk of cataracts. Antioxidant vitamins and phytochemicals that are found in possible cataract reducing fruits and vegetables will also include A, C and E as well as zeaxanthin and lutein.

Eating fish that has high levels of omega-3 fatty acids has also has been linked to the potential for reduced risk of cataract development or progression.

A great source of information on this subject and eye health in general can be found at  http://www.focusclinics.com/