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Intraocular Lens

An intraocular lens (or IOL) is a tiny, artificial lens for the eye. It replaces the eye's natural lens that is removed during cataract surgery.

What are intraocular lenses?

Intraocular lens (IOL) is an artificial acrylic lens that is implanted into the eye for lifetime in order to replace the natural lens which is taken out either because of cataracts or for refractive lens exchange RLE.

What does the near, intermediate and far vision means?

Far vision means from 1 meter to infinite distance, practically driving, watching tv, watching cinema etc.

Intermediate vision means from 40 cm to 1 meter, practically computer screen, cooking, phone, car dashboard, navigation.

Near vision means form 30cm  to 40cm, practically reading books, reading fine print, handcraft hobbies etc.

What are types of IOLs

  1. Monofocal IOL
  2. Trifocal IOL
  3. EDOF extended depth of vision IOL
  4. Toric IOL

1. Monofocal IOL

Mainly used in cataract surgery as patient can see distance but  near and intermediate vision is poor without glasses. The patient needs +2.5 diopter reading glasses and +1.5 diopter computer glasses. Night distance vision is very good and no glare and halos are expected. Cheapest and a good option if you do not mind using reading glasses.

2. Trifocal IOL

Patient is completely glasses free, good near, intermediate and far vision. Night time vision may be sub-optimal with halos around headlights while driving due to the design of the lens which has ring patterns on its surface. As a general rule if a IOL gives very good near vison, night time glare and halos is expected. 97% of the patients get use to this side effect in 3-6 months and completely happy. Not suitable for lorry drivers, pilots and individuals who wants perfect night time vision.

3. EDOF extended depth of vision IOL

A good alternative for patients who wants to be glasses free and good night time vision. Far vision and intermediate vision is very good and no night time side effects like glare and halos. Near vision is sub-optimal as patient can read his computer and telephone without glasses but may need +0.75 diopter glasses for reading fine pint.

This can also be avoided by a technique called micro-monovison in which one of the eyes are adjusted for perfect far vision and the other eye adjusted -0.75 myopic which makes reading possible without glasses if both eyes ara open. The newer high tech EDOF lenses do not havering patterns and they are the most expensive IOLs currently.

4. Toric IOL

Toric IOLs are astigmatism correcting IOLs. If the patient has astigmatism, a toric IOL must be selected. There are toric versions of the monofocal, trifocal and EDOF IOLs. Your surgeon will decide to use normal or toric version of the chosen IOL for your surgery.

What brands of IOLs we use?

In Perfect Vision, we use only FDA or CE approved highest quality IOLs from US, UK and European Manufacturers. Following is the list of IOLS we commonly implant to our patients.

Alcon, IQ; Alcon Panoptix, Alcon Vivity, Johnson&Johnson Eyehance, Johnson&Johnson Synergy, Johnson&Johnson Symphony, SIFI Mini Well, Rayner RayOne. EMV

Which IOL is the Best?

All the IOLs we use are best quality, high-tech IOLS from US, UK or European manufacturers.

Choosing the best IOL depends on various factors such as a patient's lifestyle, visual preferences, expectations, and budget. Some considerations include:

  • Visual Demands: Assessing whether the patient prioritizes near, intermediate, or distance vision in daily activities.
  • Night Vision Quality: Some lenses might cause glare or halos, which can affect night vision.
  • Budget: Different IOLs vary in cost, with high-tech lenses typically being more expensive.

The decision on which IOL to use is typically made in consultation with an ophthalmologist or surgeon. They consider the patient's individual needs and preferences before recommending the most suitable IOL.

The best IOL for a patient is subjective and varies based on individual circumstances.

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