Your Complete Guide to Laser Eye Surgery - Eye Lens Implants
Eye Lens Implants Guide:
A large portion of lens implants
done nowadays are based on new technologies like cataract surgery. A lot of people nowadays go through cataract surgery. This is when the natural lens of the eye is substituted with an artificial lens. The same techniques that are used for cataract surgery is also used for intra-ocular lens
What are some of the conditions that Lens implants are trying to treat?
What are the different types of lens implants?
Myopia - also known as nearsightedness or short sightedness
Hyperopia - also known as long sightedness or farsightedness
There are several types of implanting lenses into the eye. Sometimes, they are implanted directly into the eye in support of the natural lens of the eye. In other cases, they replace the natural lens of the eyes altogether. Lens implants can be categorised into two main sections and they are:
Intra-Ocular Lens - Cataract Extraction & IOL eye surgery
Retention of the natural lens of the eye. This can be referred to as a PHAKIC contact lens implant or an implantable contact lens or ICL
Replacement of the natural lens of the eye
are a clouding of the lens of the eye, which tend to form as we age. Experts are unsure as to why the lens changes as we get older but they have identified a variety of factors which may be a trigger:
Diabetes: people with diabetes appear to be at greater risk.
Exposure to sunlight/ultraviolet light.
Exposure to radiation such as cosmic radiation
Excessive salt consumption: a diet high in salt may contribute to cataracts.
Steroid, diuretic or tranquiliser use.
Heavy alcohol use
Cataracts can be treated in a variety of ways. These include bifocal glasses, new glasses or magnification. Another option is cataract surgery.
What is a cataract?
is where protein within the lens itself starts to form a ‘clump’ which then grows and eventually obscures the lens. It is seen as a ‘cloud’ over the lens.
There are three types of cataracts: subcapsular, cortical and nuclear.
What are the symptoms of a cataract?
Subcapsular cataracts start at the rear of the lens and can be caused by diabetes, retinitis pigmentosa or a severe level of presbyopia.
Cortical cataracts tend to form in the cortex of the lens. This is particularly noticeable in diabetics.
Nuclear cataracts are the most obvious form of cataracts. They form in the centre of the lens or nucleas.
You may notice that your vision is poor at night or that it appears to be blurred. You may have double vision (although this is very rare) or find that objects appear to have a yellow tinge.
If you find that your prescription needs to be changed more often or if you have any of these symptoms then consult your GP.
or Intra-Ocular Lens
is a clear, plastic lens, similar to your normal contact lens which can be implanted inside the eye. It is inserted inside the cornea and sits behind the iris.
This lens can either be inserted into the cornea, as an additional lens, or as a replacement for the lens itself as part of a ‘Refractive Lens Exchange
’ (RLE) procedure.
There are 3 different types of IOL
’s. These are Phakic
Phakic IOL’s are used to treat refractive errors such as short-sightedness, long-sightedness and astigmatism. They do not replace the natural lens in the eye.
Aphakic IOL’s are part of the Clear Lens Exchange procedure (CLE). They are used to replace a faulty or absent lens in the eye.
Pseudophakic IOL’s are used to replace a faulty or diseased lens of the eye with a synthetic alternative. They are used as part of the CLE or Refractive Lens Exchange (RLE) procedure.
The most popular type of Phakic IOL
is the ‘Artisan’ lens. These are either spherical (rounded) or toric (sphere/cylinder combo).
Another type of Phakic IOL
is the ICL
or ‘Implantable Contact Lens
’. An example of this is the STAAR ICL.
What is the difference between the intra-ocular lens (IOL) and the implantable contact lens (ICL)?
The main difference is that the IOL
is used to replace a cloudy or defective lens in the eye, whereas the ICL
is implanted into eyes which still have their original lens.
Your Complete Guide to Laser Eye Surgery
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Different types of Laser Eye Surgery:
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Key things to remember when undertaking Laser Eye Surgery:
Seek professional medical advice.
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Ensure that informed consent is discussed and understood.
Take your time to ensure that you fully understand the procedure, risks and limitations.
Don't be afraid to ask questions.
Further information on Eye Sight, Visual Charities and Support Groups in the UK:
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